Looking at getting my old conventional boiler replaced with a combi.
Had a few quotes, some people saying that they would never fit a
condensing combi, as they are unreliable, others saying that they are
the best thing since sliced bread. Who do I believe?

I know the company that do not recommend them are getting kick backs
from their favored supplier, so have reason not to believe their speil.

The other company that quoted, reccomeneded a Bosch 28Kw Condensing, but
could fit a non-condensing if I wanted.

Are condensing boilers any less reliable than non-condensing?

Are Bosch boilers any good?

Thanks for any advice.