Which Groupset?

never tried sram. Just not sure about the double tap but I will take in consideration. I am not going back to Shimano. It is like (to me) buying a really good sport Japanese car: the style is always going to be awful! And we all care about the style

double tap is actually a really good system. Took me about 3 hours to get used to, and I've not looked back since.

The only negative thing I have to say about double tap is occasionally, when I'm tired at the end of a long ride I shift up when I meant to shift down, but that's just a user-error really.