I've owned a full sized USP. The trigger was garbage. The slide was very heavy and putting all the mass in the reciprocating parts is not ideal for controlability. The LEM trigger is a big improvement, but still not what I would call good. Lots of people also have issues with lever type mag release and its location. I have long fingers and big hands, so it worked fine for me other than being a bit sharp, which was fixed by some very minor sanding to break the corners (they seem to have made it much smoother in current iterations). The multi-stage recoil spring setup makes it recoil a bit oddly.
Looked cool, felt good in the hand, but was really not my cup of tea in actual use as I got better at shooting.
At that time, someone I shot with semi-regularly had a p229 and I got to shoot it some fairly often. Of the two, it was definitely the easier to shoot well.
If you forced me to pick form those two, I'd pick the Sig.
If I wanted an all metal, hammer fired gun, I'd probably look at sig or CZ-75 derivatives.
If I wanted a polymer hammer fired gun, I'd probably look at the beretta PX4. the trigger is OK and there's only so much to do about it, but the rotating barrel makes for a soft shooter.
If you asked me how I was going to spend just shy of $1k, I'd get teh sig p320 x-5 legion, which I did. But it is a full size and heavier gun.
Have fun out there guys. Couldn’t make it there this year due to work and family stuff but look forward to your updates from the show.
Meanwhile this will be me all week as I see coverage from Shot on IG and Facebook each day lol