It is sturdy, however not as much as it you could expect. Assembling is not very easy - especially table legs: you'd better have some mechanical screwdriver - the simple one would be close to impossible to use because of the effort and the cheap electrical one could not have enough power. 
BUT i do not buy this for full price, only for sale - like 150-250 USD one. IF you are considering investing 350-400 into the desk - there are some other adjustable desks from popular brands with great quality - but you need to check any deals there too. 
Also this one is kinda heavy. Also you can not return once assemble, please note. But overall it is ok.