I used one this morning on my commute in (out tonight so getting the tram home).
I live in Chorlton and had about 10 all very close to choose from. Love the concept. Finding and unlocking the bike was super simple.
The issue is the bike. Even at max height the seat was way way too low for me (34 inside leg), it was uncomfortable .The gear ratio is really conservative, just spinning it the whole way in. It was like riding a kid's BMX.
The app said it took 19 minutes to do 5km/3 miles, so still faster than walking but hard work and slow compared to a 'normal' bike.
I don’t think the bikes are designed for Europeans, let’s hope they don’t take them to Scandinavia.