I bought the Cube Stereo HPA14 race 500 (what a mouth full), last of 2016 and shop wanted it gone, at significant discount. Was planning to wait for some Shimano E8000 eMTBs next year but price was right and I'm not patient.
Test ride was on road didn't want to dirty it if I decided not to buy it. Frame and ride position was perfect for me, the most important thing. Was surprising fast was doing 28-29km/hr with no assist on flat, that's off road tires at max pressure.
here is quick comparison against STEPs e6000.
Pros;
1)Quieter and smoother at higher power levels.
2)More powerful, a given as it has 50% more torque. STEPs still eats hills just not quite as fast.
3) smooth transition to 25-27km/hr cutoff, STEPs is bit sudden.
Cons
1) E6000 simple switches so much easier to use, don't need to look for them. This is differently a minus when offroad as I treat power levels as gears. Can see why E8000 gearshift switches get excellent reviews. Bosch you need to up your game.
2) Battery level 5 bars compared to E6000 percentage value plus bar graph. Will see if this becomes issue.
3) large display vulnerable to damage in crash. Purion on 2017 models addresses this but still same switches.
4) feels rough when pedalling with assist turned off, only noticeable at low speed under load ie slight hill. Shop assistant couldn't reproduce on flat. Will see it settles down with time.
5) Gearing higher than I would like 15t with XT 11-42 cassette. Will fit 11-46 when this one wears out. See how it goes in more demanding off road situations.
There was no shift sensing on this bike, not that I noticed. Not really an issue, just stop pedalling an motor runs on for 0.5sec, just enough to do shift without crunching gears. E6000 is same here.
I can see appeal of quieter Brose for MTB, as off road is when engine noise is noticeable. Another rider in front of me said he could hear me coming.
With both E6000 and CX it is normally not noticeable in eco mode if there is wind noise.
Overall happy with purchase no surprises. First impressions of MTB part of eMTB is excellent. Bosch drive lives up to expectations.