After several months living in the lounge (it's a big lounge and we don't have a shed or garage!), my girlfriend pulled rank made me put the bike out. Her bike lives under a cheap cover from argos, and the durability was reflected in the price.
This cover is a million times better. The handle bars on my mountain bike are quite wide, but this cover fits with ease. It's a good length and covers the gears, pedals and most of the 26" wheels.
It's been on the bike from october to date, and looks as good as new.