I switched from Ultegra 10 to Sram Red on my road bike, and the doubletap shifting only took a couple of rides before it became totally natural to me. It just takes a little practice to get an exact feel for where the "2nd" click is to shift to a lower gear. Until then, you'll likely try to downshift a gear, not push the lever over far enough, and end up upshifting a gear instead! You may also, out of habit, push on the side of the brake when you want to downshift...
I'd say go for it! I can now switch between my SRAM road bike and my Ultegra 9 cross bike with no confusion.

The 11-28 is compatible with all of the SRAM rear derailleurs, and it does come in the Rival-level group, so if you don't want to shell out the $$ for the red one, look around for it.