I've been doing ribs on the BGE for about a year. I go 3 hours at about 270, then a fourth hour at about 250/260.
I used to wrap on my previous smokers but I don't wrap on the BGE. I put a water pan on the diffuser plate, I do my best to keep the lid closed for the entire cook unless I'm spritzing with liquid (apple juice,brown sugar/butter)
They turn out really tender and moist every time, baby back or spares.
As far as the membrane goes, it's hit or miss depending on the ribs. Some come off very easy, some need a little extra work....and some are damn near impossible to get off. When that happens, I score them and they turn out fine.
For a great brisket, the above poster is correct, be patient through the stall. I've had stalls for an hour, some for 3 hours. Once I began waiting it out no matter what, the brisket got better and better. 195 internal temp on the brisket is the magic number. I run the egg at 225/240 until I've passed the stall and hit 195 internal. Usually takes me between 18 and 22hrs. It's long but totally worth it. Best part of the BGE is that I've gone past 20 hrs without adding wood. On my old grills, I'd be adding coals or wood frequently.