I have a Moscow+ and love it. It shares some components with the Aspen+ so I'll try and touch on those areas.
Brakes: Great, good stopping power. Not grabby, they apply smoothly
Motor: I'm 250lbs and it powers me through anything and up any hill
Front forks: They're ok, I am getting used to them, they dive a bit when braking hard but I'm heavy
Battery: 16ah lasts me (a heavy rider) 60-70km in PAS 4 biking on hilly paved roads. The Aspen+ like the Moscow+ has an upgraded charger.
Display: The C7 is ok, there's companies (epiccycles.ca) that sell a de-restricted replacement that allows more speed
I wish the display tracked cadence, top speed and temperature
Gears: Soooo smooth, rear gear changes are butter smooth even on hills
Frame: Bike frames are different but I find the Moscow a tall bike (I have the 27.5"), frame is sturdy but large
Things I dislike:
I find the pedals aren't sensitive enough to detecting rotation. I use the throttle a lot when starting from 0 for the first 2 seconds to get moving
Throttle is more on/off than a throttle you can feather
Bike is very tall
Bike is very heavy (I'm used to a hybrid bike setup for the road)
There's like ZERO room on the handlebars for much of anything due to the shape
Also regarding the light, I haven't seen the one on the Aspen+ but I'm told the Spanninga Kendo is weak. The aftermarket light I bought is also fairly weak, it's ok for a bike path or something but not amazing. I added a 1000lumen rechargeable flashlight to the bike that I can just plug into the USB port once in a while to recharge.