I've done some research on these new electric Cubs, and unfortunately they have (or at least had, perhaps they have since been fixed) some fatal flaws. There were 3 notable ones:
The first was, the motors for the deck blades had a major weakness. The shafts inside the motors were made of a cheap alloy, and upon hitting a single rock many discovered that the shaft snaps right in half. You have to replace the whole motor as a unit (~$400 each) to repair it, and as it seems the replacements had the same low quality shaft.
The second was, electrical issues. People have encountered a lot of seemingly unexplainable issues with the electrical system in the machine that realistically they shouldn't have to deal with. It probably isn't too great to go sit on your brand new electric Cub, turn the key and find that it will not do anything because the computer says 'electrical fault'.
The third ties in with the second. So you call dealers to try and fix your machine with an 'electrical fault'. Only you find, after calling numerous dealerships, that not a single technician knows how to repair these machines. Or, you've already taken it to a dealer and it has been sitting there for 2 months because they can't figure out how to fix it.
General consensus is, they released the mower too soon, didn't do enough testing, and also didn't do enough training so that service technicians actually know how to repair them.