I just watched a review of the new Di2 electronic shifting system and I'm wondering whether to hold off on upgrading to the 7900. On the plus side, it's the cycling version of auto paddle shifting. I'm a purist when it comes to most things but there's no way to shift as fast even with a short-throw stick. The narrator in the Shimano video said that it's so fast, you can shift up a steep hill without the usual complaint from the cogs. The only downsides (putting the cost aside for the moment), I noticed is the added weight, although if I skip one meal it's covered, and remembering to charge the battery. It's supposed to be available by Jan/Feb.
Anyone have any other thoughts...?
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