I'm a bit of a sucker for wallpaper cutting gadgets, tried loads, none of which work that well, always went back to the old score with scissors & cut method.
Spotted this in B&Q this morning when I went in for some paste,
Absolutely brilliant! Couldn't believe how good it was, fast, dead accurate, easy. Used it for top & bottom trimming, around sockets and best of all trimming a full length of paper into a corner.
The nifty bit is that, as soon as it shows signs of tearing wet paper instead of cutting, you snap off the blade to get a new razor sharp edge. I hung 16 lengths of paper trimmed top & bottom, trimmed into three corners, cut around about 9 sockets, switches etc - and only snapped off the blade about 5 times.
Best thing I've bought for ages.