Just purchased a Sena SMH10 Twin Set bluetooth intercom system for £260 from FC Moto website and Ive gotta say it has transformed the riding with a buddy experience. Gone is the need for silly hand and leg signals and being able to warn your mate about pedestrians in the road, oil spills, speed cameras and good looking women is a blessing.
Its a very well built unit and is quite unobtrusive when attached to your lid. Its not the most streamlined type but that is what makes it so user friendly, with only a small button for phone related actions and a big jog dial for intercom and volume I was instantly able to know exactly what I was pressing even with my thick gloves on.
The speakers are very good volume wise and on full tilt are too loud though there is virtually no bass on offer and not that you would want to, nor would it be safe to ride around with them turned up so much that you cant hear the real world and lose sense of things going on around you.
The microphone is fantastic and I have yet to suffer from wind noise (lol). I have rode up to, well, over 70mph with visor down and my buddy reckoned I was coming through clear as a bell. I believe that this is partly due to the helmets design.
Range wise, with line of sight at about 600meters was sound was perfect. If you lose your buddy by more than one corner in town it starts crackling and will probably lose connection. As soon as your buddy gets closer the intercoms beep and reconnect automatically. Out in the sticks in the twisties connection maintains through the hedged corners but can go a little crackly.
You can connect most other brands to it, sat nav, 3 other intercoms, mobile phones, radar detectors, mp3 players in many combinations.
Overall fantastic and like I say, totally transforms the experience of riding with a pal. Has many safety bonuses such as warning your bud of hazards. I know some will argue that as your chatting you must be concentrating less and I suppose scientifically that is probably true to a degree but the degree is probably subjective. If I felt my concentration was impaired I wouldnt use the bloody thing.
Best money Ive spent this year. Highly recommend it.