I was really excited to get my Swytch kit. Sure the delivery was quite delayed but I figure that was out of their control (tho as others have pointed out, the communication around this could have been a bit more proactive). First impressions were that it was a quality bit of kit, and fitting it to my bike was easy. It works well (although there's a bit of a lag between starting to peddle and the assistance kicking in, but you learn to accommodate this). I can see why people like it and for many people I imagine it's ideal (a friend of mine loves his). However, I ride on busy UK roads and only want assistance going up hills, and occasionally on the flat, so want to change the assistance level frequently, and it's design makes this difficult and potentially dangerous. This is because to change the 'assist level' (that is, to change much help it gives you) you have to take one hand off the handlebars (and your eyes off the road) to press buttons on the power pack, which is attached to the bikes handlebars. And these buttons are small, and hidden underneath the waterproof battery cover, so you might have to take several stabs to get the assistance level you want, especially if you're wearing gloves. Not ideal, especially on a bumpy road with traffic all around. The other issue I have with it is having the weight of the battery hung from the handlebars. The bike already has the Swytch electric motor in the hub of the front wheel and with the weight of battery added to it it makes the steering heavy and ponderous, so any manoeuvres become more difficult. This design may be okay for people who never want to change the level of assistance, especially if on a bike that was already heavy and they're going in a straight line on flat surfaces, say people in Holland maybe. But for real life use on UK roads on a light bike, for me at least, it's not good. I want the battery slung low and the controls directly to hand (such as a twist grip changer) so I can keep my hands on the bars and my eyes on the road. Hopefully Swytch will offer these options in the near future