i've been running futaba 9451 steering and t/b for ages now, haven,t failed me yet. I'ld say they might be a touch weak for steering at sometimes (blue groove tracklots of grip, blue groove track, fast corners) but that could also be my servo saver, and its only been been on a few occasions where i've even wondered about it.

I've been meaning to try the airtronics for about two years now but my futabas are not showing any signs of failing.