I gave it as an early Christmas present to both my son and our neighbor's kiddos; definitely a hit! Unfortunately, after playing with it we realized that one of the large switches on the bottom (the abort to be specific) that I had to modify to fit the case is no longer working (guessing that the heat generated from the grinder and/or the soldering process damaged an internal contact). Luckily it's the least 'important' switch, so I'll probably wait to replace it until something else invariably breaks (whether due to my design or rough handling :) ).