The tires don't know what kind of warmers you are using, so anything that gets the tires hot is fine as long as it gets them hot enough but not too hot. The thing you get with the name brand warmers is better quality, and special features. You could easily do a google search for reviews on any warmers you are interested in. My first set of warmers were Tire Sox. Back in the day those were probably the cheapest, no frills warmers you could get and they worked great.
