@Davie18 : That may be true for you, it may be true for the OP but clearly many haven't and acting like no-one is going there now because of the bad service because it was quiet on one cold evening doesn't make it so.
Additionally if I wanted shaved ice I wouldn't go to the shacks that are dotted around because the syrups are generally lower quality so even if the service was crappy if I needed a shaved ice fix and the end result was acceptable I would still use them.
Personally my biggest complaint about them has always been the speed, how long does it take to shave some ice? But the few times I go there I know what I am getting into so I deal.