In reply to planetmarshall:
To be fair to Mountain Equipment, they have a wide range of gloves available. The Mountain Glove comes in at £35, the Guide at £60 (just to name two). The Super Couloir is their top of the range glove, so it's hardly surprising that it's got the highest price.
From previous experience of using a great many gloves in Scottish Winter, you buy cheap you buy twice, maybe thrice, possibly more. Whilst I'm sure those Decathlon gloves are a bargain at £22, I'd like to see how they perform after a few outings. On cheaper models stitching tends to unpick rapidly, material wears away, and the general waterproofing (or lack of it) is soon felt. It's not unheard of to go through a few pairs of gloves such as this within a single season, which is a real waste of money - not to mention miserable whilst you're actually climbing.
With that in mind, just because it's cheap doesn't mean it's good, but equally just because it's expensive doesn't mean it's good either. However, Kevin certainly seems impressed and I'll take his word for it. Whether or not you wish to is another thing, but that's your choice to make (and I can completley understand why you might baulk at spending £120 on a pair of gloves because it is - before I get lost within an alternate reality - a lot of money!).