Xiaomi Moaan w8 user experience?

I am (still) looking for a 10 inch ereader, mainly for PDFs, but am very constrained by price. I've just seen the Xiaomi Moaan W8, which is 10.3 inch, and looks like it may be cheaper than the alternatives and a lot better than their older 10inch ereader, the Moaan Inkpad X (I'm in the UK, at the moment I can only get it from China so the customs charges are an unknown). But I haven't seen any reviews of it - has anyone used one of these (or the Inkpad X)?

Graham