I had issues with the machines 3 separate times over the last month or so (since I started it) and the just said, sorry they couldn't see a glitch based on the video feed(s) so no credit given. It wasn't until after I uninstalled the app after sending my final email to them about how disappointed I was, that they offered me 155 coins for my last game. I lost well over 500 (which are not cheap)! I didn't accept this offer of reimbursement. Don't waste your money!! It's a rip off and scam!