Only S&W cuffs for many years.
I just upgraded to the new S&W Model 1 Universal cuffs,one set chain, one set hinged. They upen wider and cinch down smaller than all the other models, and they have that piston-style doublelock which Peerless has always employed, a bit faster for me to operate in some stressful street situations.
I also keep a set of the S&W Mod 110 big-motha size cuffs in my war bag, for those subjects with truly huge wrists. On patrol, I seem to encounter this about once a month, usually when going out to a residence to serve an outstanding warrant of some type etc.
All in all, I usually end up reaching for the hinged cuffs to hook-up a "No" person, and more to the chain cuffs for a 'yes" [compliant]person or ANY suspected drunk or EDP; however, when they decide to try out that launch into space move with only one of the cuffs applied, I'm always glad to have the hinged ones out, cause I can usually complete the restraint process faster with that design.
By the way, HYATT has a new model out called the Ultimate, which folds open and closed and is faster than anything else to apply, and more restraining. The downside is that my dept,and probably a bunch of others, hasn't tested/approved any Hyatts for duty use, and I ain't about to get into a stupid liability hassle after an arrest over something chickensh** like using non-approved/unauthorized safety equipment.
If you work in a busy district/precinct, and your dept DOESN'T restrict you to specific cuff brands [ours is S&W or Peerless ONLY], try out those new Hyatt "Ultimate" cuffs. I think they're potentially the best design on the market for speed cuffing.
Reminder: With any of these new, larger cuff designs, like the S&W Mod 1 or 110, the Hyatt etc, be sure to get a cuff case which specifically fits them cause the old standard sized ones won't.