Details of the deal here: https://www.facebook.com/BeatTheQ
They're offering a free 2nd coffee when you order through their app this week.
I've been using this app for a while and it's a great time saver if you get a coffee in the city in the morning. You just link your card or Paypal account, and it has built in loyalty cards for each cafe. Some cafes pass on the fee so it can be a bit more expensive in some cases (1 out of the 3 places I've ordered from), but the loyalty card offsets this.
I haven't tried the new app, but there are some complaints in the Play store from people having issues completing payment with the new version. All I can say is the old version has always worked very well for me.
Used it this morning for the first time in…a year? No problems (or surcharges at my local) other than forgetting my password.