I've never dealt with any detangling devices myself. The only thing I've ever used is the spray. I had LONG and THICK hair, it was always tangled. The spray helped a lot, but it never fully cured it.

I've seen tons of commercials for the "straighteners" that detangle/straighten/smoothe-out all in one go. And it looks pretty healthy for your hair, as it won't burn your scalp or anything. If I had curly hair, or really tangled hair now, I'd look into getting one.

Good luck on your hunt! I know how much tangled hair sucks.