Reviews are not worth anything. Most people who write anything do it immediately before they've done any serious miles on it. Also most of them have never had an ebike before, or worse still, they had a go on some cheap rubbish , and then extol the virtues of their new bike.
Just about any e-bike can do 35 miles and cope with hills if you only weigh 11 stone,
The Carrera Crossfire is not bad for the money, but it seems to get too many problems from what I've read. Even the people above have mentioned taking their bikes back to get fixed. You can do without that on a commuter. The Crossfire isn't as easy to derestrict as other Chinese bikes. That's sometimes important for people that have to do long commutes.
The Woosh bikes represent state of the art Chinese bikes. I could review one without riding it because I've ridden so many electric bikes and I know how all the components work. Their bikes have about 25% more power than most because they run up to 20 amps, compared with most at 15 amps.
I wouldn't leave any e-bike tied to a lamppost all day. there's a fair chance that it won't be there when you come back to it. 17.5 miles is a stroll on an e-bike, and you'd probably enjoy it. Even when it's raining, if you have a decent cape/poncho it can still be quite pleasant. I commuted 15 miles each way for a few years and really got to enjoy my rides to and from work.
For fast commuting, you need a thin lightweight bike with 700c (28") wheels to cut down the resistance. That can make a difference of 3 or 4 mph compared with a MTB, which reduces long journey times a lot. There's not many OEM e-bikes like that. The Woosh Rio is one of them.
I would avoid a crank-drive bike. They're not too bad in the summer, but in the winter when you have cold hands, all the extra gear-changing can become very tedious and painful compared with a hub-motor bike, which you can more or less leave in top gear if you want, except for the steep hills. IMHO crank-drives are better for fun riding rather than commuting.