Swytch Go++ kit fitted to a Dawes Galaxy bicycle.
This was ordered 6 months ago and only arrived this month! Fitting was fairly straightforward except for the pedal sensor which was a tight fit requiring some filing to open up the space between pedal crank and lower bracket. One irritation was the OLED display/controller which was only supplied in one size (23 mm) and didn't fit thicker handlebars. However, their customer support team were excellent and provided an extension bar free of charge.
On a long ride with a mixture of hills and flat road, the battery gave up the ghost after 49 miles - short of the advertised 60 mile range but not bad for a heavy bike/rider.
Overall I'm impressed with a kit that extends the lifespan of an old bicycle.