I use them in the signal path instead of electros. I do this because I have no idea what I'm doing and I read from people I consider smarter than myself that it's a good idea because of potential noise.
Tantalum is also a conflict metal, if that's the kind of thing you're concerned about. Tayda sells AVX brand tant caps, however, and they are conflict free. Just a heads up that you may want to look in to where you're getting them.