I mostly agree with this, except the bundled Nebo version specifically made for this tablet didn't work for me as well as the one I got from the play store.
I also had INKredible Pro lock up on me. I've got notes in there that I can't access. I worked through some options with their support, and their final recommendation was to manually back up the files, reinstall, and manually restore the files. I didn't have any time for all that mess when it happened, and I didn't want to risk going through that again. So I guess I just donated to their app team, because I'll never use that app again.