I posted the very first message in this thread/forum one year ago. I just wanted to say that I still have my printer. I use it regularly and am still very pleased with it. After a couple of minor issues which were fixed (Qidi folks sent replacement parts very quickly), I have had no problems.
I noted that for a while I couldn't find them on Amazon (where I made my initial purchase) but looks like that is no longer the case. I was impressed to see that this thread has grown to nearly 2500 posts and lots of users. Thanks to those who have provided information and experiences about these printers!