I have a heat press that I originally got to use to put heat transfer vinyl on t-shirts & other things. I have since used it for pressing applique blocks that use fusibles such as heat & bond, and for pressing regular pieced quilt blocks - it works fantastic and gives me the flattest blocks ever. The temperature of a heat press is adjustable and you can also set the length of time of the press and the amount of pressure used. They are really versatile! I have a couple t-shirt quilts in my future and will be using it for them as well. Just be sure not to set it so hot that you melt the designs on the t-shirts.
I have a 15" press.