You mentioned the "Call Backs" that you get after a service call. We have given them SCATHING marks on almost every single call back. Not once has anyone ever followed up with us on those.
However, I put one comment out there on this forum about their poor customer service and they are all over that like bees on honey.
See where their priorities are? They don't want to fix the problem - but Good Lord - don't tell anyone else they suck!! That is bad for business.