I don't drive the E90 too much, but I've never had a problem with the turn signal stalk vs cruise stalk since the cruise one is much lower and shorter. We did just take the E90 on a trip down to SC beach and back a couple of weeks back, and I was impressed with how well the cruise works. When you push forward to set it, the speed shows in the display and the little marker appears and rotates to that speed on the speedo. If you just lightly press the lever forward, it shows the speed setting again and increases 1mph. If you hold it right there, it will increase in 1mph increments. Let go to set speed. If you press further, it will jump up to the next round 5mph speed and increase in 5mph increments. All of this is reversed for pulling back on the stalk. Anyway, it works very nicely, and they did a good job with it.
2011 M3 Silverstone/Silverstone 6MT
2001 M5 Lemans Blue/Silverstone
2007 328i wagon
2006 330i ZSP 6MT