I have a rapid rise derailleur, lo-normal what ever u want to call it. I have heard alot of people saying there a stupid idea and where a failiure but I think there great why are people so hard on them?
They are a good idea, its (in theory) more logical at the shifters (i.e. upshift - harder, downshift - easier on both shifters, as opposed to the opposite on the right shifter). It also means chains will last a bit longer, as they arent being wrenched onto larger sprockets by ham-fisted riders, its just spring tension shifting the chain up. The main downside is that they are more prone to mis-shifting when the cable snags (dirt etc).
I use mine with Duel control levers and love em very instinctive to use, but i know lots off ppl dont like em OR dont want to like em !!!!!
yeah i have the same setup with the dual control levers they work great i have just been hearing a lot of people saying that they suck and were a failure. They might be acward with regualr shifters though.