I have a Gitzo tripod when i am in the Alps and in the Himalayas (I do mountaineering), the new fiber glass is much much more stronger then before (development), so dont worry, actually i would say that fiberglass today is much more superior then wood tripods because they are complete care free. Only problem is the weight, they are really light and for some shoots I have had to place some is-screws just to make sure it wont shake from the wind. I guess another problem can be the price, glassfiber is not really cheep ;(