I've had about five or six pedis/gel manis at Ten Spot. Twice the girl I had buffed my nails for so long there was almost no nail beds left on a few of my nails. And I do mean a long time--the person I came in with was finished her gel mani before my girl even started mine! (And my nails were perfectly healthy, there was no extra buffing req'd) I had to wait about six weeks for the thin spots to grow out.
Another time I'd booked a gel mani and decided (last minute) to do a French mani and they refused to do it. I realize my change was late but really? An extra five minutes? So I paid $50 for a colour that was applied too thinly and the polish left gaps of exposed nail on some edges. When they refused the French mani, I should have left. Every other place has not minded if I decide upon French once I arrive.
By far the biggest beef I have is that I've walked in several times hoping they could take me without an appointment (fully prepared to wait a bit) and was told they are fully booked when they only have one or two customers. With staff standing around. Their business model baffles me.