bar muffs

[chaz]

Bar muffs, do they work or are they more hassle for the bit you gain? Last winter I bought some (cheap) heated gloves that run off 3 x aa batteries, although I bid get good rechargable batteries, they have helped a bit and was wondering if muffs would improve things? My thinking was that it would be better than heated grips as I have more than one bike and didn't want to clutter the bike up.
I only ride for fun but do like to ride all year round.