I built up a hydro disk brake bike this winter with a mixture of SRAM Force 22 and Red 22. I was going to go with all Red, but realized that, with the exception of the cranks, the weight and performance differences between Red and Force components is marginal. Half the weight difference between Red and Force is in the cranks. So for half the cost, I built up the bike with a Force 22 group and Red cranks.

For what its worth, I am completely happy with it. I have put about 1000 miles on it thus far with no complaints. The much maligned SRAM YAW front derailleur works flawlessly for me even though I eyeballed the alignment without even reading the instructions when installing.

The only thing I can complain about it the squarish shape of the fluid reservoir at the top of the hoods....it could be rounder and a bit more ergonomic. It doesn't bother me all that much when riding...I just think it looks clumsy.

Also, for what its worth, I have an older bike built up with original Red group (with Force FD) that is still perfectly functional. It performed flawlessly for 10 years.