Often times I'm asked, "What's a good yoga mat for me to purchase?" That can be a complicated question. One of my first yoga mats was a Gaiam and I loved it, it served its purpose; four corners, not slippery and offered a soft place for me land as I practiced.
I dont sweat a whole lot, even in a hot yoga class... so I don't have problems slipping and sliding on my mat. This, however, is a big concern for many.
There are many things to consider when purchasing a yoga mat when you decide to practice on a more consistent basis. Size, weight, color, texture to name a few.