Update
I pulled the trigger on David B's latest PC-21. I thought I was waiting for the IRIS website to give me a password update link (although I would have preferred to acquire it at SimMarket). My bad...it was in my "spam" folder. We are always told "remember to check your spam folder". I got access to my account and bought the plane. I was ready to pay $35. The good news is I got it for ~$25 (US). I'll be back with more information after I've installed and flown.
Edit: Installed into "Community" file without a hitch. Took a short out and back flight to an airport 40 miles from my local airport. Basic flight controls worked well and, as stated prior, the plane is a very responsive scooter. It lands relatively fast (using on-board indexer full flaps approach is ~125 kts.) No comment on anything other than straight VFR flying, but this is a fun airplane for VFR and acrobatics. YMMV. (Looking at some of the documentation, like the small setup file, and you will see some of the limitations / compromises necessary to design an airplane to be used with an Xbox.)