I've been using Chrome flats since 2007. They were on the fretless bass I used at the Scottish Reunion with Jacko.
I think they are the bizz...especially for the price.

In fact,
D'Addario is the only string I use!
Fretless....Chromes.. 40-95
Fretted  Prosteels.....35-95
Superb tone and durability.......oh...and price, which, for a Scotsman is a crucial factor  LOL
 
G

I'm a long time TI (& Pyramid) Short scale flats fan. They sound awesome on my Guild Strafire. On my shortscale Alembic, I found that the Chromes are a lot better.

I ordered some TI flats for my medium scale Signature and Chromes for the short scale. Hopefully they will be here soon. I'd like to try the Chromes out given the significant difference in price. I do find, however, that a lot of strings just give me too bright a sound for the types of music I prefer to play.  Playing with pick 60-70% of the time just seems to accentuate the brightness.

Brian,
 
The Chromes have a bit of *zing* fresh out of the box, but settle in really nicely after about a week or so.  Keep that in mind when you put them for the first time.

Time to rub some bacon grease or BBQ sauce into them flats, for that dull thud sound.