I ride 2-up all the time. We are around 300 lbs. together and I leave the shocks set for solo. If you're over 300, you might want to click it up a notch for the best ride. I tried it but the ride wasn't "soft" enough for my wife, but we aren't over the 300 mark yet.
The bike performs great and I'm even running an 18T front sprocket. It's not quite as quick off the line with the 18 as when solo, but I'm still happy with the compromise.
