I can't give you an exact reject rate but it went through at least 3 iterations before being acceptable. As for tolerances and material properties (overall strength of the part) the Stratasys machine is superior in both aspects. As I mentioned in the conclusion of the article, I would like to do more experiments on the parts including dimensional analysis and possibly a tensile or compression test. Having 1 data point (1 tool from each machine) wouldn't be the best results for an accurate comparison but I would still be interested in the results.