My biggest complaint is where you "mount" the spray wand back to on the metal hole slot, there's not an actual location for the wand itself, you just have to mess around with till it fits between the QD's on the bottom. Also, when the sprayer hits a small bump, the wand tends to disconnect from the spray gun (QD's) and prespray goes gushing all over the floor, this happens to us several times a week, makes a loud noise due to the metal bumping, it's distracting for the homeowner. Other than that, the wheel hasn't fallen off yet, but will be watching it carefully. Overall, I really like sprayer, but certain things could deff be improved.