Anyone bought from this site? Opinions?
http://www.banggood.com/0_3mm-1_75mm-Heacent-Reprap-Prusa-i3-3D-Printer-DIY-Assembly-Kit-p-961539.html
I’ve bought a lot of stuff from them, though nothing 3D printer related. I’ve never had a problem, shipping has been fast for a Chinese site.
I bought some quadcopter parts from them. It took right at 2 weeks for delivery to Iowa but it was in good shape and just what I was expecting. I would buy from them again, no question.
Ok so, more specifically, since I am really tempted by those 3D printer kits, is there anything you would recommend checking before placing an order?
Is this your first printer? There are other options which would likely be easier to build and certainly cheaper, unless you are very interested in this particular design.
It certainly looks like a good deal, though there may be some concerns with documentation and build quality. I would expect a fair bit of tweaking.
Yeah. First printer, I’m open to other suggestions for design and/or sources 
I bought my first 3d printer about 2 years ago. It’s a Printrbot Plus v2 and I’ve been pretty happy with it. I have been looking for something new and the Mendel90 looks like a good choice.
http://reprap.org/wiki/Mendel90
It’s exactly my printer. Very good especially after change head to e3d
My advise would be to buy i3 Herbestos, it a couple nice mods for the i3 that make it a lot better.