A few years old, but look at https://www.pedelecs.co.uk/forum/threads/pro’s-and-cons-of-buying-cytronex.32165/
The system was clearly not right for us, but could well be right for your wife. The shop is quite close to us; we've been in a few times, considering their system and for other general bike issues and they've always been very helpful.
It is a proprietary system which has its downsides when it comes to spares and repairs. I can't remember the details but I have a memory of people with their earliest system having lots of issues getting replacement batteries. That was some time ago though, and it may be a distorted memory.
The system was clearly not right for us, but could well be right for your wife. The shop is quite close to us; we've been in a few times, considering their system and for other general bike issues and they've always been very helpful.
It is a proprietary system which has its downsides when it comes to spares and repairs. I can't remember the details but I have a memory of people with their earliest system having lots of issues getting replacement batteries. That was some time ago though, and it may be a distorted memory.