The last order that our lab sent in was 1 upper Ao4, and 2 upper/lower Ao4 cases. One of the U/L cases was requested to have pink stain added to the gums. What we received as an upper pink on one, and a lower pink on the other U/L case. So we had two mix-matched cases...Needless to say it was not a good time when we opened the boxes. The devices were all super rugged and it seemed like no shaping was done in the green state. There were mill lines all over the facial surface of the teeth and messy chunks in the posteriors on all of them. We also did not receive any certificates for the zirconia. Unsure if we were supposed to receive them or not since your company uses their own brand, but our other zirconia pucks all come with identceram certificates. Our tech called about issues with the holes on some of the devices and your company offered to repair the issue, it was too close to the deadline to return them. We haven't had any issues with ordering a single case at a time, but this particular, albeit large order was a terrible experience for us.