I bought the E2 model two years ago for my bedroom studio and couldn't be happier!
I used to spend a lot of time sitting and I think that is not so good for many reasons.
So, most of the time I keep the desk up in one setting and if I'm tired just press a button and back to sitting position, plus you can store 4 different height settings. This is so good, really, I love it! ...and I love the faces of my mates when they see it in action!