Has anyone used this cheap 3d printer?

http://www.aliexpress.com/item/Automatic-Desktop-3d-printer-large/32261046955.html?spm=2114.031010208.3.2.j4Bv6J&ws_ab_test=searchweb201556_7_71_72_73_74_75,searchweb201527_5,searchweb201560_9 . I was wondering if anyone has ever used or heard of this 3d printer. It seems to be a great price however I do not know how good the quality will be. I do not know much about 3d printers, thank you.

I can't imagine much from ali express works well

Looks interesting, 180mm Radius is a little limiting but makes up with it in height of 30cm. Issue with printing some things that tall however is warping at the top so it requires some fiddling. It's nice that it does 50micron resolution. The only other issue I would have is it doesn't appear to have a heated bed which can cause some issue with certain materials and print speeds.