The only complaint I have about the Besttop duster is the fit...it doesn't, very well. There is a huge gap all the way around the roll bar, and the bikini doesn't go back far enough to prevent any thorough rain protection, it doesn't go back far enough. They could have spent a little more time and a smidge more material on a better fitting system.
From what I've seen, the STC tops fit waaayy better and offer the same benefits. Rocky-road and Roadless Gear selll them, not sure who else.