These boots are a great price - have seen them with another well known company at £45 so the price on Amazon is a good deal. They are very comfortable, warm and waterproof. The zip at the front makes them easy to get on (an issue for me with normal wellingtons, which because I have wide feet/high arch tend to be too narrow at the ankle). I ordered my normal size 5 and they fit fine both with normal thickness and thicker socks.
However, and the reason I have only given three stars, after two wears a small piece of the fabric on the right hand boot pulled away from the stitching by the zip and started to fray. Not wanting the fuss of the returns procedure I have repaired it myself. Maybe I have just been unlucky because other reviews have not mentioned this as an issue and given the price they are still probably a good buy.