Re: I like this.
In terms of improving sustain and tuning retention, this is not a weak point on either count. The contact between the bridge and body is already very strong, the strings pull the bridge tightly into the six mounting screws. Tuning problems come from the saddles and the nut and maybe the tuners, but there's nothing unstable about the fulcrum.
$10 is cheap though, I think it's more of a waste of time than money in this case, especially if you actually cut up your guitar to fit it flush. This seems like one of countless mods that might improve the sustain by .0001%, just enough to not make a liar out of anyone; numerous pitchmen looking to sell a fix for something that's hardly broken to begin with. Even with pickups, I believe one sounds very different than the next, but there's no denying pickups makers inflate and overstate their influence for the sake of making the sale. If this was a such a great improvement, I'd think it would be offered on the Deluxe Strat at least, maybe in tandem with the mini-Floyd, and the fact that it hasn't tells me Fender doesn't even think it would make for decent cheesy selling point.
IME, decking the bridge is the only mod that will win back a noticeable amount of sustain and body-influenced tone without hard tailing it altogether.
Also in regard to pickup mounting against the body or having it float on strings or a cushion, I did experiments with that with pickgaurdless Tele's and I couldn't hear any difference whatsoever, not a worthwhile mod IMO.
