Given that nobody seems to have identified anything glaringly important I think I'll pop into
Decathlon en route home later this week and have a look and a try out
Not exactly glowing reviews on the Decathlon website. The weight, considering the materials, seems a bit much.
The folded state looks like you could annoy a lot of people on the underground, especially at rush hour.
Even in their own video, the quality looks pretty sketchy, brakes and pedals especially. But one or two half decent looking components too.
It might be worth £400, and if you're only doing short rides here and there, might be OK, although, for that kind of riding, are 7 gears really necessary?