I was looking into the Jarvis legs (similar price point, $490 that has programmable heights) and using a cheap Ikea top. Don't know about sturdiness...but the reviews look good.
We bought these for our coders at my previous company and I still own one at home. Works great still after 3 years. I bought an IKEA bekant tabletop for it http://www.ikea.com/us/en/catalog/products/40253236/ which was plenty of space.
I find a monitor riser is required as well for actually standing up and not craning my neck.
I find a monitor riser is required as well for actually standing up and not craning my neck.