For what it is worth, my wife has a Bobbin with a Cytronex C1. She absolutely loves it. The bike looks fantastic, is very light and works well. She's not had any problems with it at all.
She's also got an electric MTB and that is a mid-drive and very heavy (21kg). But both bikes serve very different purposes.
I've joined here as I'm looking to convert an old carbon road bike for commuting. So I'm interested in what people would recommend. I like the Swytch idea but I'm put off by the difficulty of using a decent front light for country lanes as, from the pictures, the battery pack seems to be in the way. So hijacking the thread, I want:
1. A kit or something that all works together rather than worrying about how to join different things together with mis-matched connectors in a way that is waterproof. May be one day I'll do that but don't have the inclination at the moment.
2. To keep the fundamentals of the bike as they are. So to keep its weight low, to keep the existing gearing and integrated gear/brake levers.
3. To allow me to put effort into the ride (which is about 35k each way) when I want to but to help me when its dark, late at night and I'm knackered going uphill into a headwind. I'm not after a high electric top speed.
So where I've got to in terms of the big picture is a hub motor in the front wheel and a battery on the down tube or slung under the toptube. I know about Cytronex, I know about Swytch so I'm trying to find out what else there is. From my research so far, its looking like buying the motor and controller separate from the battery and then trying to work out how to sellotape everything together. If anyone has any suggestions for an off the shelf solution, I'd love to hear about them.