Of course depends on what qualifies as "precision" and "repeatability" for you. What you have done so far is in the 1-2mm region at best. if that suits you, then great. Most people trying to make a machine aim at least 0.1mm, the good builds aim at 0.05mm, exceptional builds can achieve 0.01 mm.

PS. I am talking "all over" not "absolute". I don't think possible to achieve absolute precision better than 0.05mm. Where "all over" means when you measure a machined element and "absolute" meaning at each point in the working area.