I was on Combivear and Sustiva and switched to Atripla about 8 months ago and I love it. the difference in how I feel is better and it is only once a day, at night...EZ and better for me...
Ive been on Atripla since October 2008 (its May 2009 now) and I love it. One pill at night. The ONLY side effect I had (which only lasted about 2 weeks) was I felt like I got really hot when I took it, like I would feel like the temperature went up in the room. After 2 weeks, I was back to normal. I highly recommend it (though I've never experienced any other medication, I've only been on Atripla)