My understanding is that you can use this any place that you would use regular soy sauce, although I'm not sure why you would want to. The main difference seems to be that the Liquid Aminos are gluten-free, and that a lot of folks are under the impression that they are lower in sodium than regular soy sauce, which they aren't.
The Bragg's website states that the Liquid Aminos have 160mg of sodium in 1/2 teaspoon (which would work out to 960mg of sodium in 1 tablespoon).
The Kikkoman website states that their regular soy sauce has 920mg of sodium in 1 tablespoon, and that their reduced sodium soy sauce has 575mg of sodium in 1 tablespoon. Both of these, however, contain wheat. Their gluten-free soy sauce has 960mg of sodium in 1 tablespoon, the same as the Liquid Aminos.
If you want the taste of soy sauce, and don't need to be gluten-free, then I don't really see the point in paying the extra $$ and spending the extra time to find Liquid Aminos when regular soy sauce actually has less sodium.
That's just me, though, and I can't comment on any taste difference since I haven't bothered trying the Liquid Aminos. Hopefully someone who uses them regularly will be by soon and able to tell you about the taste difference.