Heres my 2p worth. You do tend to get what you pay for with bathrooms.
Lada's nay Trabants of the bathroom suites are anything made in China. Theres a load of places setting up and selling this crap right now. Avoid them like the plague
Here is an example of a local firm peddling the same sort of trash. My experiences with this particular firm are worse than what you see in that link and I now refuse to fit any of their products.
Fairing slightly better and comparable with Hyundai's/ Protons are B&Q /
Wickes stuff. This crap often emanates from Turkey. Sometimes you get a good one but generally you don't.
Ford Mondeos are Ideal Standard, Armitage Shanks, usually of fairly decent quality with easily available spares.
You will get a problem here and there but generally this stuff is of merchantable quality.
I came across one make of Rolls Royce quality a few years back and the name was Jacob Delafon. There are other decent ones in this category but I cant remember the names. This one stuck in my mind because everything was spot on and had a good positive feel to it.
Someone mentioned Grohe earlier. I fitted a Grohe shower recently and found it to be of good quality although the one I fitted was a bit of a 'Rubiks cube'