I have a gas stove, too, but I wanted an electric pressure cooker because it regulates itself. Once I get the food going and set the cooking time, it brings itself up to pressure, cooks, and then automatically switches to "keep warm" and releases pressure naturally. If I want to release pressure quickly, I just move the release valve.
I've read that to quickly release pressure with a stove-top model, you have to run it under cold water. I'm really not into that