I think Brent and I are each finding a few little things that need to be improved upon for these printers. Biggest one and most needed is simply adding a 20 amp fuse on the power cord, the printer doesn't have a switch either, I'll be adding one of those soon. I plugged it in to see what kind of amps it pulled while warming the bed and hot end, and was peaking out at about 15 amps. The power supply is rated for 20 amps, so plan for a dedicated outlet just for the printer as ABS will pull a little more power as the hot end and bed both run hotter for it than PLA.
We've each ordered a mosfet board for the running the bed. The bed pulls most of the amps, so moving that extra power off the controller board helps prolong it's life. Several folks have posted about the power connections overheating and melting on the board. I haven't notice any issues, but not going to take a chance with it. The mosfet board was about $18, could use a mechanical relay or SSD instead.
Even with these little issues, I'm not regretting the purchase at all.
You can run the printer from either usb and one of the slicer softwares, or you can export the gcode and run it from the sd card directly on the printer. I'm still running from the printer's SD, but plan to setup a dedicated computer for running it when I get time.
I spent quite a bit of time this past week watching reviews and comparisons of the slicer software. I think working in each of them got me pretty familiar with all the concepts. I probably could get by with the Cura software, it seemed the most refined of the free versions, but after watching some of the side by side comparisons I noticed that the simplify3d just had a more refined movement for the same drawings. I did a couple of objects that needed supports in each, Cura just seemed to forget or did overkill. Slic3r added plenty, but you had no control over where they showed up and the ones that were added I couldn't get removed as they were fused too much to the piece. Simplify3d did a great job, you can add where they go and delete ones you don't want, the pattern/process it uses to add them makes the very easy to remove. Like with some of the cnc software, it all does the same stuff, but some of it just does it better than others.