It is a very well designed kit and I very nearly bought one, having spent weeks looking on the web at this one, Swytch, Geeko, Dillenger, Woosh, Yosepower and others. It is a neat looking job and if I wanted to electrify my vintage touring bike it would look very appropriate.
I kept trying to justify the cost to myself and supporting a British manufacturer at the same time.
Sadly, this is a perfect example of where British manufacturing is today. Innovative, but economies of scale and yes, overheads including wages, rule against it.
The more I learned about hub kits (thanks to this forum), the more I realised the limitations of the Cytronex kit.
Only 3 pas levels, no "walk assist" or throttle options, bespoke controller integrated into the bottle battery, bespoke (and minimal function) display, front hub motor only.
I don't doubt the quality of the kit (although I think the motor is Chinese anyway?) and the designer/business owner can be justifiably proud. There are a few examples online though, where his response to problems come across as, shall we say, "robustly protective".
In the end I sadly had to conclude that I could get a better kit (for me) at a much lower cost.
I understand that it has sold well over several years (although the numbers will be minimal in "world" terms). Such a shame really.