I took the updated BULLS Six50+ for a ride today. My initial thoughts: Provides a certain level of cognitive ease. If your shifting techniques aren't sharp then the motor will compensate for it and the experience is quite enjoyable. Dynamic assist is useful when climbing some steep technical sections and when you don't want to lose the momentum. Loss of range. On my other Haibike (S Rx), I only use Tour mode and very rarely the sport mode. This gives me ~30 miles on a 400whr powerpack. But on a eMTB with knobby tires, eMTB mode and 500whr powerpack, I only got 29miles. I rode mostly on single tracks and it was not hilly. I can attribute this to the higher consumption in eMTB mode. Personally, I would not get this update. Simply because the system is exerting itself too much and sometimes I feel like I only need minimal assistance. It suits those who doesn't care about the range and prefer very sporty riding dynamics. Sadly, there is no option to revert back to the older firmware once you update it.