Great
Especially cause they actually have some nice tools for the job (they don't use the archaic goo things to make a mold for your retainers they just scan your teeth with a significantly less torturous machine)
The app is great but it doesn't look the best but over all I like it
We have loved it we think it is better than braces. They pop on and off.
The doctors are nice, and they do a nice job with my teeth.