I have a gas stove, but use the hob for most of my daily cooking I like them as they are fast, easy to clean and great with cast iron. I am a one man show and like to cook, but hate to clean. They are ideal for smaller meal preparation.
They heat a cast iron pan in an instant.... 5 times faster than gas in my estimation....and they are great for simmering in a small pot or dutch oven without hot spots.. even more adjustable than gas in my opinion.
Especially handy when cooking a larger meal for friends and family....you can use your gas stove for the bulk and the hob for side cooking sauces or pre prep while other stuff is cooking.
All around, one of my better purchases.
@Rifleman1776 Having had an ex-wife or two, it is a cheap $60 solution to avoiding the female wrath and fixation on scratching her stove top and the endless looks of "I told you so" every time she is at the stove.. 1 minor scratch and she will engrave on your tombstone, "The SOB scratched my stove."