Went to pull the trigger on a couple of SSDs I was eyeing and ended up buying them on the MM instead. It's horrific! It's busy and cluttered, hard to navigate and you don't know where to look when you first load the page.
But for me, a big draw of OcUK when I first started buying here many years ago was the UI. Competitor sites were very busy, lots of shiny graphics and too many links, buttons and promotions. OcUK just felt... honest. Different from the other sites in every good way. Now not only is it noticeably harder to navigate, but it just feels like another hardware site. Just browsing the site used to be a fun experience, I always enjoyed speccing up PCs for friends on here (must have spent thousands in total for the number I've built), now it's frankly unpleasant.
I'll be honest, this will almost certainly effect my choice of where to buy. I never bothered to even check competitors before because I felt loyal and confident in OcUK and much preferred the site. Now if the site's going to be unpleasant to use, I might go with someone else more often.