I commute 20 miles/day (round trip) to work and back on a 2019 RCS, plus some open desert riding in the early morning and weekends, and it is awesome!!!! Plenty of power, excellent range, and very stable both at speed on roads or tight & technical trails. I am a grown ass man and this bike makes me feel like I'm a kid again. I've only done basic maintenance, replaced two tubes, and one tire but that's only because I beat the crap out of this bike.
When riding on private property, I've got it up to 32mph in 9th gear with race mode, pedaling at full sprint. When I'm commuting though I usually keep on assist level 1 and cruise at apprx 23mph in 6 or 7th gear at a comfortable cadence, using throttle assist boost to get off the line at stoplights. Eco mode will eek out a sustained 20mph in 4th/5th without struggling.