just bought a UC9 yesterday, can't wait to prove you out! going into range this morning to do it..
side benefit.. safety, slide release both ambidextrous... only thing I need to operate with index finger (I'm lefty) is slide release.. otherwise I can use it and not look like a goofball.
p.s. the newest version of this gun (mine says manuf. in April) has tactical rail for light mounting and also has 13 rd mags (2) instead of 10 rounders. I haven't tested the full size mags from the thunder 9, don't know if you can upload this gun, but 13 rds ain't bad for a compact conceal 9mm.
(update) I've been to the range several times with it... shoots straight as a string, pulls down really fast, very easy to clean, not a lot of recoil because it's all steel.. I can't find anything wrong with this gun! And I really like that the newest model has gone up from 10 rd mags to 13... and it comes with a second mag, which some manufacturers are now cutting from the box to save money...
It's not as small as a Glock 26 but it's smaller than the 19... small enough to conceal if you're serious about it... great ergonomics, and for me, a lefty, it's got safety and slide release on BOTH sides.. big, easy to operate controls.. best 9mm my left hand has ever used..
For me, the safety setup is perfect. I can chamber a round, use the safety to drop the hammer, and if I have to pull it out I just flip down the safety and pull the first round in double action, and keep shooting til the bad guy's done... a very fast way to engage, but very safe to carry... that hammer-drop decocker safety is a wonderful thing.