I lost the weight rather quickly (75 lbs in 11 months), but despite that I've managed to maintain it give or take a few lbs for the last 4 years, thanks to keeping track of my food on MFP. Maintaining, in my experience, is far more difficult than losing it was, so I'm quite proud of the fact that I've been able to say "I did it" for four years so far. There's no going back.
For exercise I do mostly cardio (50-70 miles a week all in my wheelchair). I do weights occasionally, but it's not my favorite thing to do. I do body-weight exercises 3x/week.