So, in the spirit of getting the cart waaaay ahead of the mule on the heels of this upcoming custom order, I've been doing some reading on strap locks...

http://club.alembicguitars.net/index.php?topic=4317.msg51920#msg51920

Right off the top I'll just say I don't care for them, and never needed them before. 

That said, being something of a instrument repair hack, I'm quite familiar with the consequences of carelessness, so my nature is to exercise extreme care when hooking up. I never even leave my strap on a bass during set breaks. Heck, I don't even trust guitar stands. That said, sometimes stuff just happens... no matter how careful you are. 

Personally, I like these D'Addario buttons:

http://www.musiciansfriend.com/strap-buttons-for-fretted-instruments/daddario-planet-waves-metal-guitar-strap-buttons?rNtt=planet%20waves%20strap%20button%20&index=2

I put a set of the brass ones on my Persuader last year, and liked them so well that I bought three more sets for other basses. 

Should I be rethinking this? It is going on a custom Alembic after all. Keep in mind, they'll be going on an Anniversary Omega body five-string. (which is a tad smaller than a Standard Omega body)

Alembics come standard with Schaller strap locks. I've been using them since the late 70's without any problems. I like the fact that they are U shaped so if by some chance the pin comes out of the hole they will still hold the bass. The nut on the strap portion can get loose but all I do is add a dab of blue loctite when I tighten it and have never had one come apart. Personally I won't play any instrument I own standing up without some type of strap lock system.  
 
If you want to be really sure you could use Stanley Clarke's method. He takes a long screw and a washer to permanently attach the strap to the bass.  
 
Keith

I'm totally with Keith on this, especially the U shaped part. I don't trust the little ball bearings on the Dunlop style. I also don't like when manufacturers recess those ones into the body. I did the washer thing here and there, but eventually put Schallers on all my basses.

Schaller  strap locks for me as well .
 
 I use just a tiny bit of Blue Loctite 242 on the threads for the strap parts. Just a tiny bit . Have a nice rag handy if you need to clean up the strap a bit afterward.
   
http://www.loctiteproducts.com/p/t_lkr_blue/overview/Loctite-Threadlocker-Blue-242.htm
 
I do not advise using the Red Loctite for this application.
 
 Wolf

The only issue I've ever had with Schallers is the screw backing out once, but I felt it wobble before it came totally out and now I regularly ensure the screws are in tight.

Schaller.  On every electric I own or ever had care of. Period.
(Yes, including '53 Les Paul & '59 ES-330-TD).
 
Peter (who will pass on the vintage-correct sound of headstock hitting floor, thank you very much)

I use the Schaller straplpocks on all my basses and guitars. Like Bsee mentions, I think you have to check the screw and the strap fixing regularly as they do work loose over time.  
A college lecturers mantra to us during our engineering apprenticeship was, if it moves...... or gets warm........, yaw cn bet yawer bottom dollar it'll wear ewt and bray-eek...... check iiit.
 
(for the non UK guy's,  thats me trying to write in phonetic brummie)

Thanks for all the feedback fellas!
 
Well, clearly I'm in a minority on this one, and you guys surly have the experienced voice.  =)
 
Since I've got plenty of time to ponder options, maybe what I should do is try a set of Schallers on my Persuader for a while this Summer and see if I warm to them.  
 
Thanks All!

And you're hilarious Jazzy! Next time you're oh-vahh hee-ahh, I'll teach you some Southwest Virginia Brummie that would baffle even my (ancestral) homefolks in old Huncote.  
 
Brits & Americans - two peoples separated by a common language... indeed. =)

I used Stanley's approach, I took my strap locks off, got two wood screws, four 3/4 washers (two for each end) and screwed them right into the bass and I don't ever have to worry about the strap slipping off the holder!!

Schallers are my first choice.  The one exception is on guitars that have the strap button on the back of the neck.  In this position I prefer the Dunlops as the Schallers tend to stick out more, are relatively sharp, and poke me in the tummy as I play.  And, of course, I ALWAYS check the buttons and locking part on the strap to make sure everything is tight.
 
Bill, tgo

Interesting, Bill; that's the last place I would go with Dunlop, given their push-to-release design, and neither I nor anyone I roadied for ever had a complaint about pokage.  And although I will admit I now have considerably more belly to push on the back with than you do, I went 100% Schaller 100 lbs ago.  Besides, that U channel does make me feel all warm & fuzzy.
 
Peter

I've done what Bill has on my SC, although I use the Schallers on all others. Like Bill said, the button on the SC kept poking me. I also use Locktite on the strap parts and the screw into the bass. Since doing so several years ago, I haven't had any issue with looseness, although the parts can still be disassembled when necessary.
Jon

Schaller's all the way! For the small handful of my guitars that have a strap button on the back, I go with the rubber washer technique.

FWIW, another famous Alembican emailed me privately, they use Dunlop straplocks *without* using the locking mechanism. They're physically larger buttons, making it very difficult to accidentally unhook your strap when used like that. But then so are the ones I currently use.  
 
Of the straplocks I've looked at, I like the Schallers best... very solid *snap* when they engage, and as Keith and Coz pointed out, the U-shaped design would still hold even if the lock failed.  
 
I dunno... I mean, bottom line - however unlikely, it's more hardware to fail, and another fastener to make sure is tight. Plus, as a matter of habit, I never, *ever*, let go of my bass anyway. I can't imagine the Vulcan-like mindset changing even with the added safety of straplocks in place, so there isn't really much to lose by trying them for a while.  
 
As a humorous aside, I was talking to another guitar player about this yesterday, who often (for good-natured sport) questions my thing for finer musical instruments. They were like - Are you serious!? You're actually spending time thinking about what strap buttons to put on a bass!? My reply, Well... yeah, of course I'm serious... why would I not?  
 
This just in folks - we're different. I have to assume that's how we all ended up here.