Very smooth trigger. I'd say too light for a carry gun without safety, but exceptional at the range.
The modified gizmo on the trigger (what Glock calls a "trigger safety" and is NOT a safety...) is really unobtrusive, giving a much better feeling than all the striker-fired pistols I've tried.
The grip is 1/2" shorter than the TP9 SA/SF/V2. It takes 15 rounds magazines, but it can take the full size magazines. The slide is very slightly shorter than the other models. The slide disassembles in a slightly different manner: since the slide's backplate lacks the cutout for the ejector (seemingly in order to reduce the possible ingress of debris in the gun), there are cutouts in the slide's bottom rails just ahead of the frame steel tabs/rails, so instead of taking the slide out by pulling it all the way forward, you just disconnect it, push it forward 1" or so, and lift it up at once.
The optional "safety" tab on the trigger guard effectively blocks the trigger. Very positive engagement/disengagement, you won't be able to activate it inadvertently. Too clumsy to be the equivalent of a real safety, but will positively block the trigger, can't fire the gun with that on.
Another difference with other models is the ambidextrous slide stop/release, with larger and more protruding tab surface.
All in all, a sweet gun in the G19 size range.