Bought a book on GooglePlay once. Wanted to download it as an ePub. ePub wasn't available due to a technical error on Google's side (apparently affecting all epubs). Had to use Adobe Digital Editions to "download" it only to figure out the download wasn't available. + DRMs (i.e. can't read the ebook on a smartphone).
Went to libgen instead, will never buy a book on GooglePlay again.