Rubbish.I give advice based on the fact I go out and repair boilers everyday for a living..so I know a bit about it
Eh? Where did that come from? Did I specifically mention you or how you give advice out? Wind yer neck in please and don't make it personal.
Most companies will give their preferred suppliers as they have particular expertise or favourable terms with that manufacture e.g. I will mostly recommend Intergas as I am a P5 installer so can give longer warranties, they have great support and backup and I believe their kit is some of the best all round on the market. How else can anyone recommend a particular bit of kit unless they have experience with it?? Unfortunately though some installers recommend a piece of kit because they get nice presents when they install a certain amount rather than it being the best bit of kit to fit.