I looked at these boots because they claimed to be waterproof in some of the BM literature. However the dealer said they are not.I tried them on and found them a bit fiddly to get on and they were tight around my calves. I adjusted them out to fit but they were even more fiddly and didn't seem to sit right on the ankle protection. Went to the NEC to buy Tech 10's, tried them on and really struggled to get the bootie thing into the boot. Even more messing around than the GS boots. Eventually ended up with Tech 3's. These are really easy to get on, mega comfy, offer great protection and because they are predominently plastic covered, they give fairly good weather protection. To cap it all they only cost me £120!!!!!
For small money these are easily the best boots you can buy IMHO. Look kinda startrooper like though. They also fit underneath my Heine Gericke trousers too so you don't have to worry about rain leaking through the top.