I had an 8 .9 (which was a wonderful tablet for its day). Then I got a 7" for my Mom. Not so great, too small. I ordered an 8" (OK, but nothing special) , and then a 7th gen 10", which is nice. My Mom is getting frustrated with the lack of newer games for her old 7" , so I am giving her the newer 8" so she can load more card games.
I play a lot of role-playing games and also read a lot, so 10" tablets are a must for me. This 9th Gen is quite similar to my 7th Gen. It virtually set up itself based on my previous settings on my older tablet. (UPDATE 10/31: Although the Silk browser bookmarks and favorites did sync, books and apps did not sync. I'm hoping that this issue will be corrected by Amazon soon.) (UPDATE 11/2: A hard shutdown and reboot has resolved the above issues). The drop down options are slightly different. If you have a 7" or an 8" Kindle, you will probably be impressed with this tablet's capabilities. If, like myself, you have an older 10, the differences won't be immediately apparent. I'm assuming that the promised increased speeds will be noticeable when I get a chance to stream video or play my games.
Those of us who utilize Amazon products and services enjoy our Fire tablets. Those who don't would probably prefer other brands of tablets, because Amazon doesn't make it easy to access content that isn't Amazon.