As a yoga instructor for regular practice, I like the Manduka Pro-Lite mat. It does not weigh as much as the Pro (this is mainly for setting up at home and leaving your mat there). It has a more cloth top and so my hands do not slip on it like they do on a typical cheaper latex like mat that you get at Walmart or Target. It also stands up to a lot of wear and tear. I do yoga on average anywhere between 1-3 hours a day on most days and the mat does not start to peel like the cheaper ones.
If you are going to do any kind of "warm" or "hot" yoga, or are just afraid that your hands and feet are going to slip and slide no matter what, the Mat by Lululemon is worth the investment. You put your hands and feet on that mat, and you are not going anywhere!
I am thinking about investing in one myself. I don't like the warm/hot yoga classes, but if I am in a full class, the room humidity and temperature changes with everyone's breathing and body heat and I will sometimes slide on my own mat.
Hope this helps!