I am not a great fan of Eleglide bikes, but I think every bike manufacturer should be selling bikes like them - with extensive list of available spare parts.
Saneagles original post was in reference to Eleglide bikes/parts. If you'd already bought an Eleglide bike and needed a new controller, display or motor wheel you'd be a fool not to go back to them for spares if only to ensure 100% compatibility.
Fiido do the same - as do an increasing number of other Chinese e-bike retailers - sell you a fairly decent bike at an affordable price, shipped from within the UK and offer an amazing list of spares for all their e-bikes. In the rare event a part isn't shown, you email them, and they'll add it to the list to purchase post-haste (I've seen them do that with more obscure parts multiple times now).
I find Woosh's views somewhat out-of-date here. Fiido support is certainly very good - it's in effect no more remote than Woosh is in Southend. You can call or email or preferably send a video, they'll tell you what the issue is and point you to the part. Like a Woosh spare part (unless you live near Southend), you'll have to fit it yourself or find a bike shop who'll help, but Fiido even have an extensive library of "How to repair" various faults on Youtube. For most, DIY part substitution really is a piece of cake (once someone tells you what the issue is, and Fiido certainly are very good at that too). It'd be nice if Engwe/Eleglide/ADO et al owners chipped in with their experiences, because I'm finding the Chinese really have upped their game to compete on many things other than just price.
If many of these Chinese operators are now shipping from UK warehouses, how are they not paying import duty/tax, VAT, NI for those employees here (directly or indirectly)? HMRC aren't that dumb.
If you can't stand the heat...
PS:
@Woosh: If you live in both France and the UK, where do you pay your taxes?!! Why didn't you buy a second home in Devon/Norfolk/Windermere instead of giving your cash to the French? That's not supporting the UK economy either, is it?