Nice boots, that so far have been pretty good.
I am a size 10 in everything (except motorbike boots), including other brands of walking boots I have used, but when I got size 10 in these boots they were too small. I had to return them (thanks to Amazon's great return system) and order size 11s (from elsewhere, as not in stock here). Size 11s were snug, but the right size.
I use them every day (I'm a dog walker) for many hours, so they get a good work out. These are comfortable and, as a previous reviewer has said, really simple to take on and off. They are generally waterproof, though in a torrential downpour the other day (lasting a few hours) they did start to leak, likely to be from the top rather than the sides or base, so for the price, these are as waterproof as I expected. Good grip too. Very happy with them so far, but lose a star as not totally waterproof, and the sizing issue was a bit of hassle.
UPDATE 1-Feb-2013: After only a month and a half these boots are starting to fall apart. Stitching has come apart just behind the toes and more worryingly, the stitching behind the heel on one of them has worn out, starting to leave a big gap - I am going to have to get another (different!) pair of boots now. As mentioned above, I used them every (week)day for the last month and a half, and we have had bad weather (rain, mud & snow), but even for the low price, they should have lasted longer than this. Shame as they are comfortable! Reduced rating from 4* to 2*, and would not buy again.