Are Hextronics the same as Towerpros? If they are, and they are using the same servos, I certainly wouldn't recommend them. I can't speak as to their reliability or longevity, because I returned mine before trying them in an expensive airplane. However, I can tell you that they were not nearly precise enough for proper control of an aircraft, and the backlash/bounceback when moving to full deflection and when coming to center was awful. That, however, was my experience with the Towerpros, although it would likely apply to the same servo under a different label.

-Pat