I have the previous incarnation of
one of these. It is really rather good, although I did have battery connection issues which I fixed myself. It has a rear hub motor and a 13AH battery that gives me about 35 miles range on my commute. I suspect the battery suffered from little use early in its life (I bought the bike a year old) and it would have more range. I get to work fresh as a daisy, which is the main reason I got it.
I have also converted an Orbit to a front hub set up. It's a very different machine. Lighter and more nimble, but not half the fun. The Oxygen is surprisingly easy to ride off-road. The power kicks in quickly and helps me up inclines I would otherwise struggle on. It is heavy - probably 23Kg with all the bits I have on it, but doesn't feel it. I had a battery built up for the Orbit and I think it would give me 70 miles range, with me putting a fair amount of effort in.
There are lots of <£1000 machines out there, but just don't! I got a Woosh cheap off eBay and it basically fell to pieces. The motor and battery were great, but the frame and fittings were £99 Argos bike quality. Horrible. I have fallen out with the owner of the company on pedelecs.co.uk after honest reviews of his product. They seem to have learned their lesson and their newer offerings seem better equipped and built.
Incidentally, I suspect 99%+ of traffic police will not have the slightest clue as to ebike regulations. That's not to say I condone riding illegally, but the chances of getting caught - unless some eejit* really screws up (& someone will sooner or later) - are very slim at the moment.
* There are lots of those on pedelecs boasting about machines that grossly exceed 15.5MPH. One manufacturer sells a 1000W, 'off-road' (yeah, right) bike that can be switched to 250W to ride legally, but how many buyers are going to select the slower option?