My Mrs has had a kindle for the best part of 10 years (or since they first came out) and now has a gen 11 Fire HD 10+ which she has had for about 6 months having previously had something like a Gen 8 Fire.
What she has told me is firstly don't bother with the higher spec 10+ . Her mother has the same more basic model and it does everything that the higher spec model does at less cost. The only real advantage is that she can use the docking port which you cannot do on the basic machine.
The Fire range has brilliant battery life for the first 12 months (depending on use) but will go off the boil hence the reason she is one of those that keeps it plugged in most of the time, and there are a number of apps that are not compatible compared to other devices. For example on the + you do not get free security, and you do not get the free printing app which you do get on the more basic machine.
Oh, and you cannot turn off some of the poxy adverts they keep posting up and you sudden;y get blasted by crap music and an ad yo\u don't want and there is no way of turning it off unless you pay for it
She can download audio books, music, in fact she does everything on her fire that she used to do on a laptop (she paid out for the security and printing app) and she lives on it for probably 15 hours out of every 24 so probably gives it 10 years use in about 3, so as you can probably guess, she likes it.
Hope that is of some help John.
Anything else you want to know, I can get an answer for you
