There are really two things to consider when evaluating this collection: quality of execution, and usefulness at the gaming table.
In terms of execution, this “album” is top-notch. For each of the four different genres represented, you get an introductory track, a loopable main track, and a fade-out track. Each track captures the genre extremely well, and creates a good immersive experience. You can easily picture yourself or your character being right in the thick of the action. Sound effects (swordplay, gunfire, and so on) dominate, enhancing verisimilitude.
I’m less enthusiastic about the collection’s usefulness at the gaming table. Most of the tracks include very distinct dialogue that may distract you and your players from the action going on within your own story. On the whole, the tracks seem too busy, too intrusive. They could easily overwhelm your back-and-forth discussion with your players.
In the end, I don’t think I’d be too likely to use these tracks to score role-playing scenarios, though I might very well play them in the background of a skirmish-type game. I think these tracks serve board/miniatures gamers more than role-players.