Second winter of using these now , Partner an myself+ inlaw use them . I still can't get over how good they actually are ours don't have any heat controllers but manage to stay at just the right temp. No longer an ordeal now riding at motorway speed on a winters day. At £40 Ebay they make the oxford rage of clothing seem dear , My inlaw also got a posh battery pack powered jacket , cost him over a hundred pounds but I don't really think it is any better than our cheepos.
I don't have any £ relationship to anybody selling these, but just calling a spade a spade they are good! An easy matter to rig a cigar lighter power take of on the fazer fairing panels. or get an optional battery pack , Combined with heated grips great!