75% chance that your jobs will be botched.
I used them for about two months. When they're on, they're on.
They can produce quality work at a nice price. HOWEVER, they are only "on" maybe 20% of the time. Over half of the jobs were botched in some way or another. They broke a frame and told me that it's my frame vendors responsibility, and that they would not give me any credit.
The break wouldn't have been so bad, but it was three weeks into a simple spherical distance RX before they told me. Another case they completely lost a customers frame that I sent in. They would "Call me" back every time I called for the status on the frame that was apparently lost somewhere in their lab. I gave up trying and chalked it up to experience.
Honestly I could go on all day with the issues you will have with them, but in short, save yourself and your customers. Would never user them again.
Reason of review: Bad quality.