I purchased the Quartz SE run-out Model 10 years ago as a surprise 70th Birthday present for my Wife . It proved too much of a surprise and she refused to ride it . Since then the only major expenditure has been a new rear wheel rim and a battery Re-cell with Jimmy at Insat which increased the Battery Capacity from 8Ah to 11Ah . The 200 W front hub motor and 24V System are vintage now . The machine has been 100 % reliable and is still the one of choice for shorter or shopping trips, rather than a Folder/ Fat Tyre or a 700 mm wheeled crank drive Ebike . It still equals the range of the others on my regular 25 mile ride in the hilly lanes in the Vale of Glamorgan . Decent mudguards are handy for containing water on these roads whereas the skimpy ones on the Fat Tyre will ensure that it will all land on your lap . This machine was made in China but designed by Leisger in Germany . An exact copy of the Quartz design seems to be the NCM` Paris `which is not surprising as Leisger seems to have morphed into Leon of Hannover which supply this machine . I am sure the Quartz will easily last another 10 years of Ebiking but not sure about this Rider who by then will be 92 !