I've had the 48 model for 7 years now and the oven has stopped working.  BlueStar official servicers in my area are either out of business or do not know how to work on them (their words).  Contacting BlueStar they responded, and I quote, "Unfortunately your unit is not under warranty, and we are unable to troubleshoot or diagnose over phone or email"

Their level is support is literally, "Our recommendations are too (sic) google local servicers near me".

So, if you get one, pray it never has a problem or you are on your own.