Got around to fitting mine today (while there was some football game or other taking place

).
Wired it directly to the Neg battery terminal for the earth and through No. 4 fuse, with the Autocom so that it's only live with the ignition on.
I delayed the fitting because I needed (another, number three

) Autocom headset and I picked one up today.
Mounted the Amp on the top of the airbox cover with velcro and the remote I've mounted on the left handlebar next to the clutch master-cylinder so that I can roll the volume control with my thumb.
I followed the advice Gary has on his website and took the remote apart to squirt plenty of silicone sealer around the internals.
Fitting was very simple and straight forward once I'd found a suitable location (my bike doesn't have much space left under the seat and tank).
Went for a test ride, various roads, various speeds.
I'm still using a Sony CD Walkman as a music source (I'm not getting an MP3 Player until the Walkman packs up, plus I like the fact that the Walkman controls can be used with it sat under the clear plastic of the map-pocket on my tankbag. I'm not sure that an MP3 Player would let me do that?).
I use moulded ear-plugs. Above 60 mph the Nav II instructions were always clear enough but the music was hit & miss with much of the sound quality being lost.
With the AmpliRider I can hear the music ok up to higher speeds but it's not the massive improvement I'd expected. At 80 mph the Amp needs to be at max volume.
It is an improvement but I'd expected from what has been said that I wouldn't be able to use max volume. The quality of the sound is very much better it has to be said.
I'm going to try and shift the helmet speakers to see if that makes any difference.
Given the cost of the AmpliRider, it's a still worthwhile mod.