App worked great for a long time but last two times i tried to use it I couldn't complete orders bcos it said there was problem with payment. However it showed up in my checking account both times. First time I experienced the problem I tried twice to place order so two charges on my account. All three charges were removed next day but still there shouldn't have been an issue. I had been a TB app user for couple years so was bummed the issue wasn't resolved. I uninstalled unfortunately.