Some things you might want to consider before you purchase (not necessarily in order of importance or consideration):
1. What use will you put the tripod to most? Will the tripod stand up to the use and abuse.
2. Will you be hiking or carrying it for long distances? How much does it weigh?
3. What weight will it hold, an 8 ounce camera or an 11 pounder?
4. Can the center column be removed/repositioned for lower to the ground shooting?
5. Are the legs able to extend outward so the tripod can be placed very close to the ground?
6. Cost. It is way too easy to spend a tremendous amount of money on a tripod. Be sure it will do what you want.
7. How heavy is the tripod itself. There are newer tripods that weigh less but are very strong. But is the cost worth it?
8. Check out the rating/reviews of the tripod you pick no matter what brand. Other users can tell you quickly whether company hype is just that or whether company claims are real.
9. What kind of tripod head will you be putting on the tripod itself. For me that was as much of a decision as the tripod itself.
With that said, the tripod I inherited saw lots of abuse before it ever came to me. Since it has been in my possession, I've had it in creek beds, used it as a hiking stick, dropped it on a stone walkway and smashed one of the knobs (which as since been replaced). This rugged tripod won't fold all the way shut any longer. I could probably use it as a club and do some real damage if the need arose. It does the job I need it for and does it well. Replacement cost would be somewhere around $700.
A good place to find photographer reviews of camera equipment as well as tripods is
http://www.fredmiranda.com The people on that forum are not shy about giving their opinions.
Good luck,
Janet