I like the baseplates on the bridge position. It isn't a night-and-day change, but it is noticeable. It won't take you from not enough to enough, but it will take from from not enough, to just not quite enough. It does add some attitude, a little bit of balls, and a small bump in output. Again, not so much that it takes you from not enough to enough, but it gets you in the ballpark. If you are worried about microphonics, a blow dryer, and some candle wax will do ya. Simply melt some candle wax to the baseplate on the side you intend to stick to the pickup. After it hardens, place it on the pickup as desired and reheat until the wax flows. Let it harden again ( 10-15min ) and check to see that it is firmly attached. If it is, install and rock on.
On a set of ssl-1s, I found the bridge to be very thin and ball-less. I got a bridge plate and it certainly added some balls and a little bit of gain. Not enough to get you all the way there, but it certainly became more authoritative. It makes sense why the popular option is SSL1's in the middle and neck position, with an SSL5 in the bridge. An SSl1 in the bridge with a baseplate gives it a Tele-like grunt that has a slightly lower output than a comparable Tele pickup.