Pros: Consistent height, adjustable, durable
Cons: Harder to put into ground (not much), maybe a bit goofy
Overall, the Tornado Tee is a good product. It claims to add more distance to your tee shots by reducing spin, and while I'm not ready to say that it does, I don't think that it takes any distance away.
One thing that I really liked about the tee is that it gives a consistent height every time. For me, sticking it in the ground all the way with the mesh extended is perfect for my driver. You can also collapse the mesh down if you are going to be using a fairway wood or hybrid off the tee. Also, since the part in the ground is plastic and the part you are hitting off is mesh and just moves with the stroke, the tee doesn't fly out of the ground where you can't find it. That, coupled with the fact that these things seem to be nearly indestructible means that this might be the last tee you buy.
On the negative side, it's a bit tougher to put into the ground than a normal tee, but not much... you can still put the ball on the end and press it into the ground, but you have to let the mesh collapse down first and then once the tee is in the ground, pull the mesh back up. Not really a huge deal. The only other negative I could see is for people who put there tees to use as divot tools. These really won't work for that (and really, that's not such a bad thing as a tee ISN'T a good divot tool anyways). The other thing is that they are maybe a bit goofy looking... they kind of stand out, especially if you have one with colored mesh, but it's not a big deal. Also, even in the collapsed set up, the ball is too high off the ground to hit an iron (at least for me).
There are other similar tees to this, but I honestly feel these do the best of them. Others, like the Brush Tee or the 4 More Yards Tee don't really allow for height adjustment, but like I said earlier, these do. If you are looking for a tee that will last, gives a consistent height, and possibly a few more yards than this is the tee for you.