The current model I'm putting through its paces a mid-drive Bosch based bike http://www.ebco-ebikes.co.uk/products-page/ebco/ebco-ucl-70/
I am 20st 8 or 130kg. It does rather well although I failed to get it up this hill https://scontent-lhr3-1.xx.fbcdn.net/t31.0-8/14086433_101541... near Avoncliff (Winsley Hill).
I've come to the conclusion that e-bikes are not just a bicycle with motor. It is not cycling in the sense of sport cycling or leisure cycling. It is a transformative form of transport that offer you the freedom and the range you need within an urban (and lesser extent rural) environment to just simply get from A to B while being connected to your local community.
I've been lending the bike out to various people whenever I have stopped. The Deliveroo (takeaway delivered by bike) couriers were absolutely stunned how different it is. There isn't a single person that hasn't tried the bike out that hasn't been absolutely stunned at what it can do. It really is nothing like cycling.
I think the biggest impact for me is that I don't worry about hills any more. It also gives you significant acceleration from a standing start. You are usually up to 16mph within a 4-5 pedals. This is really important when vehicular cycling. I feel a lot more confident in traffic on one of these.
Everyone seems to be talking about self-driving cars. Seriously, at an urban level, do not discount just how important the e-bike is. It's the most efficient and fastest way you can go from A to B in a city.
One other thing, don't buy a cheap bike. The mid-drive systems are expensive but they are the best on the market. Hub motors are just not as good.
I can only suggest you try one of them. Find a local stockist and go borrow one for an hour.
Of note my wife has one with a throttle. She has a bad knee. She refused a mobility scooter, but a lovely blue bike with a basket on the front looks good and she can peddle as much as she is physically able to, and then let the bike take her home.
E-bikes are stunning. Really really amazingly good modes of transport.
After testing the one today on a 40mile round trip, I will state, next time I'm taking my normal gravel bike. For leisure they are just not as demanding physically so not as much fun for that. But that's me. For getting around the city of Bath, I will always use the e-bike. Arrive fresh and relaxed. I feel I can easily explore the city now without having to worry about hills.