I like doing the puzzles while listening.to my audiobook, but every few moves, my book is interrupted with ads. Yes, you can skip after five seconds, then you wait another 5 seconds for ANOTHER skip button hidden in the corner. And then there's the missing pieces. I don't know who thought it was a good idea to steal the past few pieces to induce you to Watching more ads... But it steals my satisfaction of completion when I cant place those last few pieces myself.