I was very against profiles until i read so much about them, and was so determined to improve my 3d skills that I purchased a 40 size OMP proyak w OS 55ax. Total cost was about $300 for plane/engine/servos after discounts.
It was the best move ever. I learned so much with that plane, and was so easy/fun to fly. Had an absolute blast. It is now in the hanger - stripped and waiting for a recover. In the mean time I bought an OMP Razor Yak to go to the next level. If the first one was any indication, the Razor Yak must be NUTS! Will be putting together soon.

Im a solid believer now. They are inexpensive, take a beating and really do improve your skills. Just my opinion/experience.