ok having recently fitted a a new kitchen and done the shopping around.
Magnet/Howden etc. are major suppliers to the small fitters but I rejected them both as I wanted colour co-ordinated carcasses not white with disguise panels. I wanted decent backs and 18mm thick.
I ended up using a
very local place, (1/4 mile away), I got first class service, one carcass was damaged and another was the wrong size, both replacements delivered within an hour of my phone call.
The wife went for a high gloss maple on maple carcass. A high gloss worktop with matching splashback, I had to fabricate a cover for the boiler, but got a matching door for that and the stairs cubby hole. In total the carcasses/doors/worktops/splashback etc cost me about £3,500 and well worth it.
My brother who fitts both magnet and howden on his jobs said "You haven't saved on what I can get them for you", my reply which was most shocking to him was. "I was not looking to save money, I wanted decent quality"