Step-through is really helpful, and will get more helpful as time goes on.
Looks good value for what you get, though it's difficult to judge the quality of the components as mostly they just say 'Rad Power Bikes approved'
The battery should last a good few years, but it could be a custom one (frame batteries often are) and difficult to source a replacement when the time comes.
It is a very heavy bike. Our Raleigh Motus is quite a lump at 25kg, the RadRhino is 33kg. That mightn't matter too much when riding (depends how you ride), but it will be a big minus if you need to hump it anywhere, or heaven forbid need to ride it unpowered. Unusually, the step-though is quoted a fraction lighter (33kg) than the crossbar version (33.3kg).
It's got a high capacity battery, but with those tyres it's not going to be that efficient. I guess you may not be that concerned for a huge range anyway?