I have a pair as replacements for my original bulbs and they are fantastic, much better than the orginal bulbs however the only problem when fitted by the dealer was that the bulbs didnt fit the lenses correctley so a bit of filing by myself was needed but word of warning be careful when you do that.
The other thing was where to mount the coils and on a 1200 is a bit of a problem so at the moment untill I have more time they are mounted under the front mudguard.
So only one thing I can say about they WOW fantastic and I wish I had them on my 1150 because there great.
Am I ranting? Sorry must be getting old.
Mark