how to grow mushrooms

In my searches about how to grow mushrooms, I’ve found many different supplies and kits that are available over the internet. Let’s face it, most nurseries don’t supply mushroom growing kits. I know I’ll have to purchase something over the internet. I’m faced with many websites and products, and I’m not sure which ones are the best. So far, I’ve found Mushy Mart to be very helpful on the scientific aspect of growing mushrooms. They have a variety of supplies and look to be pretty creditable.  If anyone has had any experience with their kits, please let me know.