What are the main differences in effects between the Mini and Professional models? Can I achieve a detox effect with the Mini, 20 x 32 inch mat?

You can get the whole-body experience from just one mini mat. First, place it under your back, and then, after some time, under your legs. It will take more time than if you use one large mat, but you will target specific zones. You can also place the mat on your abdomen.

It can be used for high heat detox sessions with sweating, but it takes more time to influence the whole body in this way. 

All mats can be used for sleeping, but the Professional and especially Single or Double Size work the best. 

Extra care and medical professional supervision may be recommended for such intensive sessions and detox procedures on high heat levels.