They sell a lot of Rxs so I am sure they have a mechanic they use that knows them well. Agree, I would rather have a Lexus warranty though.
Their cars look immaculately prepared though which is what drew me to them. Some of the cars I viewed at Lexus main dealers were very shabby.
I spoke to them when I was looking for my RX and they seemed very genuine to me. The person I spoke to was definitely a fanatic of the RX and they prepare them to a very high level according to him. All alloys are refurbished, body work and interior prepped. They do charge towards lexus main dealers but the cars to look lovely.
I'm the end I bought from a main dealer and tbh glad I did as I have just had the brake actuator changed under warrantee which would have cost over 2k if I had to pay myself.
That said, I think the cars at Boss motors wild be well worth a look as looked very well preppped. Look on their website and they sell very high end cars all well presented