I have a Grohe toilet and shower (no complaints about either), Bristan taps (sink and bath) no complaints apart from the hot/cold colour dot wearing off quickly (it’s not like I clean them often either…) and a Kaldewei steel bath (no complaints).
The wall mirror cabinet I just got off Amazon (£200) as local store options seemed a fair bit more expensive, I expected it to arrive in pieces and the electrics to fry but it’s been fine. The heated mirror is great (I have a decent extractor but condensation still forms on the mirror/glass and stays for a couple of minutes after getting out of the shower, the heating element stops that entirely), has an internal shaver port for the tooth brush and a hands-free on/off for the LED lights (they are useless for shaving etc. but handy at night if you forget to turn the main bathroom lights on)
Best thing I did was follow the plumbers advice and go with him to the local indy plumbing supplies place, got a lot of advice there, they didn’t seem to push me to the most expensive stuff (and plumber would give his opinion if he’d fitted a certain model before) and I got the bath and sink/vanity unit half price as ex-showroom (they even stored it for a couple of months as I had some delays in being able to start the work).