I had pure white quartz in my previous kitchen and had a love hate relationship because it showed every bit of dust. In our new kitchen I've picked the same quality quartz but with a slight grey fleck to it. Love it and yes it is worth the many pounds spent.
No. Had quartz in previous kitchen (white with grey fleck) and in this kitchen (white marble effect). I personally think that dark colours (certainly black, like black granite) will days but light colours are beautiful.
Ours marks very quickly - off white colour. Can get rid of marks but really have to scrub & as frequent tea drinkers often get drips. Suspect reading other views this is not how it should be & we should've complained at the time I suspect. Also ours has chipped a fair bit on the edges.
We have white with grey blue (Carrera style) marbling . I love it. But it’s not 2 years old yet so I would expect to love it still. Any stubborn stains clean off with bar keepers friend. It looks classic but also modern. I hope it will not date.