Agree if you are only getting a couple of thousand miles out of a motor it will be costly after warranty ends. Dont fance paying £850 for a motor that may not last.
Don't worry, you'll always have us to look after you A lot cheaper than £850 too! Just have your motor repaired by us, or even upgraded... then you shouldn't have to worry about warranty anyway. Click on our name to take a look: eBike Motor Centre If you're not from the UK? Just click the tab for worldwide partners at the top of our home page.
(sorry that was a bit of a shameless plug, but you guys need to know you have options )