Have had the GT1600 for 18 months now, the bike is fantastic, the engine is silky smooth and can pull from very low revs, handling is reassuring even at slow speeds, the equipment is fantastic and functional. I love the bike and its at home in the centre of London or cruising the country lanes.
However reliability has been an issue for my bike, thankfully its under warranty! the problems to date, auto cruise failure, starter button failure (had to be recovered) engine warning light (faulty coil) and had to put bike in a further three times for a faulty starter motor clutch which is now resolved. Had to have the both remote controls replaced as well.
Maybe I've been unfortunate, but regardless I'll keep the bike, best bike I've ever had, just hope the faults stop!