UPDATE 10-23-15 & 11-8-15:Don't believe all of the 1 start ratings here. These are mostly folks who are mad that they can't use 3rd party filament! This is a decent 3D printer and it's tough to beat its price!You can't beat this machine for the price. Yes, you have to buy proprietary ABS and PLA cartridges (and yes, the 2.0A can print with both PLA and ABS and I believe that there is an upgrade available for the 2.0), but then don't you already do that for your regular printer? If you don't, kudos to you and you'll probably be one of those folks who hacks this printer to run different firmware and you'll probably reset the cartridge chips and not buy them from XYZ. I look at it this way; XYZ is selling this thing less expensively than anyone else and they need to make a profit somewhere. Why not do it like the rest of the printer manufacturers, with the printer cartridges. All that aside, let's get to the printer.The first thing I printed was the "demo" sample which looks like an egg cup. This used both ABS cartridges and came out quite nice. This was the ONLY thing I have been able to print so far using the included glue on the glass tray/bed, everything else just would not stick. So, upon reading many posts, I saw folks were using painters tape. That has been more successful for me, except when I try to print objects with detached or moving parts (like a crescent wrench). After a few passes the objects tend to detach from the painters tape and then get caught in the extruder and I have to cancel the job. So far, my only successful prints outside of the demo have been two Dr. Who tardises (a tiny one, 2/3 in. and a salt shaker sized one, 2in.). Everything else I have tried with just glue on the glass tray has failed so far. I am going to try to print a crescent wrench once more, this time using A LOT of glue on the glass. If it works, I will try to post an update here.I did not have to calibrate the printer, it worked right out of the box. I will say though that something is slightly off on the "dump bin" for the left extruder. The printer has a system for cleaning the extruders by dragging them across a metal and rubber bar inside the printer. The right one works great, but the left one barely even touches the bar. This might be a calibration issue or the bar is mounted too low, I'm not 100% sure yet. The software does give some decent build options for speed vs quality, durability/thickness vs display-only/thinness, detail vs jaggy, breakaway supports, raft, etc. To get the best info. on what all the settings do and some general tutorials, I found the videos on http://support.xyzprinting.com/global_en/Support/tutorial to be a 1/2 way decent source of info.UPDATE 6-11-15: I tried printing a crescent wrench again with no success (on painters tape). I think glue is going to be the only way that it will work and it will take quite a bit of glue I believe. I was able to finally print something else with just glue. The trick seems to be using a lot of glue. I put one layer down over the entire glass tray and then went and did it again with another layer. I think it might take 3 layers for the crescent wrench, I'll post another update if I get a working print. One more thing to note is that if you do use painters tape, be sure to peel it ALL off after each print. I only peeled off and repalced the strips where the printed object was leaving the rest of the tape in place for future prints. I just tried peeling it all off and the repeated heating and cooling of the print bed/glass-tray made the painters tape stick really bad and it was quite difficult to remove it.UPDATE 6-24-15: I have printed more objects and I am having more success with the glue now, you just have to put at least two good coats down. The other issue then becomes getting the printed object off of the print-bed/tray. I actually used my knife sharpener on the included "putty knife" to give it a better edge (I didn't make it sharp, I just gave it a bevel which also made the tip of the blade a bit thinner) and I have had much better success in removing printed objects. I wouldn't recommend making it actually sharp to a point though, or you'll likely end up scratching the glass print-bed. I'm going to try printing a single print crescent wrench once more with three layers of glue (still no success) this time and see if it works. I'll post again if it does.UPDATE 10-23-15: I have printed an ALMOST working crescent wrench now. I just need to do a few more tweaks to how I print it and I think it will be golden. I have found this glue (http://www.amazon.com/gp/product/B0088RL2QI?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s01) to work better even that what came with the printer. Two coats per job/print seem to work perfectly. I'm going to post more very soon with some photos. This printer is worth the money, esp. now with saving $100 off list!UPDATE 11-8-2015:As promised, I have uploaded a couple of photos of some things I have made with this printer. The glue above works really well and as you can see from the photos, I was finally able to print a 1 print working crescent wrench (my ultimate goal)!! So IMO this printer is awesome. The wrench I printed is here: http://www.thingiverse.com/thing:594235Follow his instructions in his video and you should not have any issues. The only thing I changed for speed (it was a 4hr print for me) in printing was that I changed the density to 30%.UPDATE 10-20-17:Yes, more than 2 years later my printer is still working perfectly! I noticed that the photos somehow got distorted, so I've attempted to re-upload them. I have successfully printed many different things, and the correct glue seems to be the key to anything printing well! This printer is a blast and their new color printer looks to be even cooler (no more need for 2 or more print heads and spools)!