I want to know about this too. I have Shimano Ultegra 10 speed shifters, but I want to change it to something more comfortable. What others are using?

I had both. I stuck with SRAM because they were cheaper at the time. I believe SRAM makes both shifters, they are just branded different. I preferred the paddles on the Zipps.

The feel of the shift was the same

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The curious task of economics is to demonstrate to men how little they really know about what they imagine they can design.

I had and really liked the SRAM shifters, and recommend them. It seems they are a design that tends to fail over time. I purchased an inexpensive fix kit - think it was around $20 - that includes some of the internals that can break. It left me having to ride my road bike for a race once, as the shifter broke a couple days prior, and I didn't have the kit at the time. I ended up replacing with the non-carbon ones as they function the same and are a lot less expensive. I have no experience with the Zipp ones, though.

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