Brilliant thread, it will help me choose a new boiler/ controller in the
spring.

I had a Camray 70/90 Oil boiler in my previous house controlled by a
Honeywell AQ6000, a brilliant controller unfortunately no longer made. I
installed and commissioned it in August 1996, never had any problems with
the boiler or controller and AFAIAA the new owners (4Yrs) have had good
service from it.
However, new technology, we must move on, am looking forward to getting to
grips with it.

Regards
Don