They release a "Christmas present" update every year with lots of extras. I haven't gotten this yet but it's supposed to be loaded with new features. It is really an amazing thing to anticipate. Some of the features are really useful.
I was coming from a fairly quiet vehicle already, the Prius, so I think that helped. I can honestly say though I don't miss the noise one bit.
Our building plans to add electricity to every parking stall within the next two years but I don't think we'll be here any longer than another year (fingers crossed). My ultimate dream is to be able to power this with solar eventually.