IMO it depends what expert you read.What about the actual bikes?
I am currently "researching" E-Bikes. The Ribble looks interesting in that it is relatively light for an E-Bike (typically E-Bikes weigh in at about 23kg, so, two of them (ie typical e-Bikes) in the garage of our motorhome will be 56kg of our payload gone). But, they are hub drive, and, the general consensus of what I have read so far is that crank drive (or, mid drive, is, I think the correct term), is preferable.
The Boardman is mid drive but apparently gets lots of BB problems as the motor is inside that.
The Ribble looks good with a lovely finish.
The rear hub drive is well done but (as a new concept) looks odd.
It has "through axles" which I have never had but he he demo'd it and it looked simple.