The Bard's Tale is huge in just about every way. It's a 3.5GB download (at most), it's a long, elaborate game and, until now, it was $6, which is not quite expensive, but certainly pricier than the average game. Today's sale, however, brings the cost down to an outright bargain. For $3 you can get the full Cary Elwes experience on your phone or tablet. It's almost unreasonable not to go for it.
If you're really attached to those three bucks and need some extra convincing, you can always read Ryan's review of the game here. The short version is that The Bard's Tale is entertaining, hilarious, and is a huge download. It's a minimum 1.7GB for regular devices, and, optionally, 3.5GB for anything running a Tegra 3, so make sure you're on WiFi when you install it. And grab a snack.