Keep in Mind STLPilot in direct competition with Aviation Models( formerly Toc) They both produce profile ARFs.

I will keep all other thoughts to myself as to keep this on topic and help the original poster decide between two models. I do not think you can go wrong with any of the proven ARF's out there QQ, Aerotech, Aviation/Toc, Aeroworks is not out yet so I will reserve judgment until it is actually available. My comparisons between the QQ and TOC/Aviation models are from real hands on experience w/o prejudice.