Just got mine, and out of the box I got pretty decent prints by doing the following: 1) Z-depth sensor is set to 1mm from the bottom (it says in the manual 'near the bottom'. 2) Calibrate the bed with E1 5-6 times, twice cold 2-3 times hot, this is ensure the bed is more accurate when hot, because the majority of your printing will be with a heated bed. 3) When calibrating E2 do not put any pressure on the extruder when trying to tighten the two screws back up, if you do when E2 heats up after hours of printing thermal expansion will lift the extruder up, since all your doing when pushing down on it is binding up the screw threads. Here is a test of the usual boat, it had some stringing around the top of the arch way, but that is to be expected since their aren't any supports.