I've had this printer for quite a while and love it. At the beginning, I had some issues with the .38 print head clogging, but since they sent me a .5 print head, this printer has been largely bulletproof.
I did, after 2 years, have to replace the heating bed when the PEI surface delaminated (yes, I know I can get another PEI sheet and replace, but this way I have a spare heating bed!) :)
You have to do some assembly out of the box, but it is easy to do. I have heard some reviewers have problems with bed leveling. I have NEVER had to level the bed. I had a BAD experience with a $200.00 printer with "automatic bed leveling," so I was wary about bed leveling issues. This has been no problem with the TAZ 5.
I have printed ABS and PLA with this printer. But my favorite filament is HIPS hands down. It acetone smooths like ABS, but doesn't warp or yellow as badly and is quite light.
Lulzbot tech support is brilliant. When I had the print clogging problem, they helped me diagnose the problem and get if fixed in nothing flat.
And the new version of the Cura software is MUCH better than the older versions. It gives a lot more control over the attributes of the gcode files it produces.
Overall, I love this printer!