Love it! Fixed barrel, TDC hop up easily adjustable, and rmr mount on fixed platform. Been using it in couple of games and performance wise it is similar to AAP-01.
If you on the budget get aap-01 if you like replica of existing real steel and prefer the slide blowback get TP22.
I find the look of "Beretta and Glock baby" more over AAP-01 but it is personal opinion.
One thing I noticed is that the TP22 likes heavy BBs - outside the UK they use 0.36 as preferred. I been using 0.32 and they are hopping well but lots of CQB sites in UK now limits the BB weight to 0.25g
Additionally you may find the attached diagram useful. It is showing which parts of TP22 are compatible with which platform for replacements (credits to TTI themselves for providing this).