Erm....what's wrong with the BWM one then chaps???
I've had one for about 3 years. One of the newer, collarless versions. I haven't tried the Gebrings etc.
Good things about BWM one:
It's only been ineffective once - several hours at close to zero C on the motorway. Otherwise, warmth is always OK.
I don't find cold arms a problem, even though my biceps take a battering from the wind. Similarly with the neck - a decent neckwarmer is enough.
It's comfortable, and is a great insulator even when not turned on. I think the aluminised fabric reflects body heat back in.
About every 3rd time I wear it, I forget I've got it on at petrol stations etc and walk away from the bike while still connected. The curly wire stretches and gently pulls me back, and it's never done any damage. I did wipe out once while wearing it - it disconnected itself, but the control knob smashed open on the tarmac. I had to get another one from BMW - about £30 I think.
There's a really great pocket for keeping the wire in while you're not connected.
Imperfections are:
The control is a bit fiddly. You can change the heat setting (off-low-hi) on the move. Usually this is OK, but you might have to stop and fiddle around your waist to check. I usually have the control knob inside my jacket to keep it dry.
Once or twice, I've accidentally turned the heat setting to off while fiddling with my buttons etc.
Overall very happy with it, and cannot imagine how anyone could do without between October and April (august and july for you Scotsmen !)
