I've had several crowns from Sabra done dental implants. 95% of the time I was displeased with fit and quality. Poor fit after molds were taken and the quality of the crowns weren't good at all.
I highly don't recommend them based on my experiences.
I love Sabra Dental. The work on dentures, crown and bridge and implants are top notch. If I ever have a complex case, they are right there to help me. They make me look good and that is what you want from a dental lab. This is my lab of choice and will continue to use them and recommend them to my colleagues.