Random musings on my part
1) The kit came with a KT 36V/48V 6 mosfet controller with max current 15 A, which seemed quite a lot for the little AKM-74 . Topbikekit also sell a AKM-74 48V version (I presume with different winding) - 48V 15A seems a lot of power for a microhub.
2) I wonder if the 20 inch wheel mitigates the small torque from the motor - so you end up with something that is a lot better climbing hills than I would expect
3) The front hub seems to work quite well and having the battery over the front wheel seems to help the balance - The riding position is very upright, so I think more of the weight would be over the back wheel. Its quite well balanced to move around and carry. I did add an extra strap to the battery bag, to strap it onto the front vertical bar - it is very secure now.
4 ) I wonder if the lightness of the motor mitigates some of the usual front hub disadvantages - I know
@Nealh has a bike with the Bafang micro hub in a front wheel
5) I converted this bike for a specific purpose - having a bike to take in the campervan with us on holiday, so it would do limited mileage. However my wife has quite taken to it (especially how easy it is to get out and put back). I might have to persuade her for us to change to a disc braked folding donor bike and move the kit across (which wouldn't be a big job)
6) I can see how you could use a kit like this for a lightweight bike, as per Woosh Faro. There's plenty of 10kg road bikes of ebay/marketplace/gumtree. You can add a similar kit with a 36V 10Ah (or even a 36V 15Ah or 48V 10Ah) bag battery and still end up with a very light e-bike