You can use it on any device; all my devices are Apple, so I can play on any, or listen on one, and then the other; (audible keeps up with your place in the book for any device) don't know how that would work with non Apple.
I think that you own the book forever whether you've listened or not. It will go on the cloud if not actively listening; this saves on storage on your device.
If you strongly dislike a book for any reason, you can return it and exchange for something else. I have done that several times, very easy.
Audible is owned by Amazon, if that bothers you.
They have a huuuge library of books; everything I've searched for they have. They often have sales, buy two for one credit, or just buy not using your monthly credit, for a discount. (They also have free offerings, short books or stories, every month, most of which I don't care for.) Also included with membership is a daily synopsis of news from the NYT and WAsh. Post.
The readers are usually good, and usually add to the book's enjoyment, in my opinion. I've found a few who drive me crazy with their verbal oddities, but you learn which ones to avoid!
My eyesight is deteriorating, so this has been a lifesaver for me, a lifetime addictive reader.