I had one. Please take my word on this . . . Keep the bottom end and those gears in there tight and greased up.
There is what I feel is a design flaw in that there isnt enough "meat"(?) on the gears and when/if they wear, the
bottom bracket becomes a symphony of crunchy sounds_ gears slipping teeth, etc . . .
Otherwise, its cool to ride with no chain grime and spray.
I liked the quiet
hummmmmmm noise it made going down he road.