The quiet storm was one of Flitons first planes, and I beleive that the quality has improved further since then. A fellow club member has a QS, and has flown it without incident (as far as I know) for about two years. Having said that he flies it very gently.
I personally have owned a prodigy, infinity and rogue. All now in the bin, I flew them too hard

. Not a criticism, it happens to most of my planes, they tend to get a rough ride in my hands. Having said that my prodigy did also fold its wings, during a blender. Inspection of the damage suggests that the wings had been built slightly too light for such an extream manouver. Also as mentioned in the QS review, look at strengthening the landing gear plate, and consider turning the landing gear around so it rakes forward rather than backward, to lessen the chance of problems .
At our club we have got about 4 of their Extra 330s, and they have proved incredibly popular.
I have just received the Inspire 60, and the mini Inspire, both still currently in their boxes awaiting construction, which will probably begin next week, though may be tomorrow if I have time. So as you can see, I have every confidence in fliton