In reply to JackM92:
Found similar to Andy when I first got mine, mainly when walking down hill but after a few trips out they felt just fine.
They fit a variety of crampons well too, and a wee bit warmer than Nepal's. Also the added advantage of the laces never freezing due to being hidden under the gaiter, although this means if you're a person like me who likes to re-lace boots before putting crampons on then it's a bit of added faff to unzip the whole thing.
Mines started leaking/seeping after a season of use but Mountain Boot are good with returns although Scarpa don't make the Guide anymore (replaced with the Tech) which I've now got and absolutely can't fault other than having a thinner and less hard wearing sole unit.
If you can get the Phantom Guide for a cheapish price then you won't go wrong.