I already own an electric bike for over 10 years that has the motor in the front wheel. Deciding that it was due for replacement I saw and bought a Panda mdrive unit. This has been fitted to my own mountain bike. A little tricky to fit but after finding it was a screw sticking through into the bottom bracket area I am now the proud owner of ebike 2. Now the pluses : The control of the motor via a digital dashboard is very much better and gives many different settings for applying just the right amount of oomph that you want. e.g. off road on hilly terrain more power required than on roads where the bike runs better. Gear changes are good as the torque reduces then increases automatically. Most of all I like the fact that the bike is better balanced because the motor weight is low down. Recommendation would be to buy one and see for yourself. Cons: Not sure how long it will last - only time will tell. Noted also that If I stop with the rear sensor exactly opposite the rear magnet then my unit gives an error 3 code. Not sure if this should happen? It does go away once cycling again.