Dropped the kalkhoff off at 50 cycles Loughborough Monday where it was decided to replace the motor. Picked up two days later and and have since covered about 50 miles with no problems at all. Was assured that a 2 year motor guarantee has restarted with the replacement unit so will see how it goes from now on. With around 675 miles on the clock I,me planning less visits to 50 cycles in the future hoping that the teething problems are now sorted and I can concentrate on getting some longer rides under my belt. On paper there's not a lot that can beat the Kalkhoff Integrale for comfort, range and quietness of the motor, just hoping longer term reliability will eventually be proved. Think I can still recommend it to others overall, it is so much quieter than either Yamaha or Bosch motors and very nice to ride. Obviously the need for a replacement motor so early in the bikes life is a big set back when evaluating a review, and this might have made a lot of prospective buyers minds up not to go ahead, but looking at the bigger picture I personally feel that it could still be a good choice, and I say that on account of the good back up service I've experienced from 50 cycles Loughborough to date. There,s been no quibbling, the repairs have been carried out efficiently and at short notice so I have no complaints at all. However, I am retired and have the time to return the bike for warranty work and enjoy checking out any new showroom models at the same time. I can understand that for others with busier lives having to spend time and money travelling back to the shop might be a bit irritating. So my previous disappointment has diminished somewhat, but still like the Integrale and although would never say never make a switch back to a Yamaha or Bosch powered bike in the future, am more than happy to persevere for now. Suppose many might disagree?