Have to agree it is not the quietest motor.
With boost it is how the assistance is delivered, an instant wallop as soon as you touch the pedals and a substantial overrun then you stop pedalling. Ok if you are trying to pedal kick onto or over an obstacle but not for a lot else. Generally I prefer to use the app to increase the trail assist level if needed rather than use boost.
Picked my E Genius 710 up last week but work has been getting in the way of really seeing what it can do so I gave it a good thrashing today (the pic was at the start of the ride and its also been very dry here).
Theres so much I really love about how it handles in both climbing and downhill, feels like I've been riding it for ages already.
I'm off work for 2 weeks now got so much riding planned, maybe even a bday trip to Bike Park Wales. Follow Mike on Strava to see this activity. Join for free.