Hi, I live in Chicago and our Chicago Public Library MakerLab (http://www.chipublib.org/maker-lab/) has a Lulzbot TAZ 4. I stopped by yesterday to find they are still having print quality issues since it was first setup in July.
They told me the best they have been able to do is the soldier head model. The green model was printed on their TAZ 4. The yellow was printed their MakerBot Replicator 2.
Lowering the print layer height will assist with improving quality of overhangs, which that piece has a lot of. If they’re using Lulzbot Slic3r settings, they’re not getting as fine detail as possible. Layer height can go down to .06. Also, make sure the fan is on. When I started, I made the mistake of putting the printer on a table and unknowingly had the rear feet hanging off the table, this made the unit wobble sometimes and messed up whatever I was printing.