I have to give my praise for my standing/sitting desk that I got last fall.
It's the IKEA SKARSTA desk found here (Note: IKEA Canada website):
[/url]http://www.ikea.com/ca/en/catalog/products/S49084965/[/url]
It's only CAD $260 (around $200 USD), solid as a rock, and goes up/down effortlessly in around 60 seconds. The hand crank tucks away nicely and it wasn't difficult to put together.
I can't recommend it enough. If you find you don't like standing, just sit. I like it especially since whenever the better half is using it, she can have it how she likes it.
As far as using a standing desk goes, I really like it. I think it would be even better at work than at home because you get to move around more and it just feels more involved in the environment around you. It's kind of like having a seat at the bar instead of a table at a restaurant -- there's something inviting about it to others and it makes it easy for people to pull up next to you and collaborate.
I also find standing improves the posture a bit but it does get tiring, even still, for me. Then again, I'm on my feet for much of the day so that makes me less likely to use the standing desk when I get home.
I much, much prefer the standing position when working on projects and tinkering. It allows you to move about much easier and get better angles and positions.
For $260, I'm hoping to get another one to replace this other IKEA desk that I have. It's the typical desk you see but I have the extending legs. However, they are only really sturdy when retracted. I find them way too wobbly to be used while standing, and each leg has to be extended individually. At least this newer model of it allows you to twist, extend, then twist again to lock (hopefully at the same height as the others!). The older ones that I have (only a few years old) had to be unscrewed the whole way, and I'm not exaggerating when I estimate that it takes 500-1000 turns to get them to raise (each leg!) -- and then at full height, they had around 1 inch of play so the desk felt like a drunk.
That's my experience with them so far. I'm a big fan for sure, but I do like to be able to sit if it's a computer you'll be at for long periods of time.