Been using a Jarvis desk for a few years, have one at work and the exact same model at home. Can definitely recommend them. They aren't wobbly at standing either. My friend had the ikea one and it was such a pain getting warranty stuff since they wanted him to haul the thing back to the store over an hour away.
Yeah the thing I like about Jarvis is that they don't get wobbly near the limit of their extension like some of the other standup desks I've seen. I'm 6'5" and I have a thick anti-fatigue mat, so I have to raise it very high.
On top of that I also have a 42" TV on a monitor arm and an attached keyboard tray, and still no wobble.
