I loved Bastion, and was exposed to the Transistor soundtrack before buying the game. My hopes were way up. The opening is excellent: very smooth and natural. But it's a slow downhill from there. The ability customization UI, in particular, is incredibly awkward. There's no logical flow to it, so I end up just clicking randomly until I get what I want. In addition, the absence of a minimap or any other indicator of where you've been before make it difficult to pick up again after not playing for a few days. This is a case of lame-duck game mechanics leaning on strong graphics and sound to support themselves.
The game really draws you in, and I'm honestly surprised there was no sequel. Word of warning for strategy types: this game had to run on 1999 hardware. That means there's no underlying simulation, but just a bunch of dice. If you keep loading a save and trying something with different inputs, you'll find that the outcome will generally be random. From a technical point of view, this game does a marvelous job of concealing the fact that you're mostly just taking a random walk. But if you're a powergamey type, you're going to have a very hard time mustering the suspension of disbelief required to finish the game.