Good experience with Howdens – all done at the end of last year. Complete kitchen redesign (flipped a kitchen/living room around), and did a utility room too. Service was great and we’re very happy with the results.
Only challenge was ensuring we had enough time with the designers/reps. They were really stretched, but we got there.
As above, suspect it’s very dependent on who you get for your designer and how much time they have.
We used Kingston-upon-Thames if any help. Happy to share any further details if helpful.