After tested M510 V2 about 100km here's my thought :
1. Smoother feeling
2. No more on off assist on light pedalling at flat terrain
3. No need to wait 10 seconds or more to operate
4. More natural feeling
5. Can be tuned via Besst Pro, already tested and i guarantee it's working
6. Less battery consumption after tuned with besst pro, with 840Wh just use 1 bar for about 40kms with 1000m elevation gain.
7. But it sound little louder than v1 , especially on high cadence
For me this is the best M series i ever had. I already had M600, M500, M410 and M510 v1. Next will try M820 for lightweight EMTB, hope March will arrive.