yes, this phone is very snappy for the size. Feels faster than the two android watches I have, that are not used. Needed something that can be tucked away connected with bt and a voice notifier.
The xposed module "app settings" is good to tweak certain apps dpi and font size. I think my overall dpi is 120-130.
Also setcpu profiles to save when screen off and 900mhz screen on, only max cpu with incoming calls. Then greenify and amplify.
For me it last 2 days of dog walks, or 4-5 hours on connected to bt with a few short calls.