I've used a foto pro tri-pod for long exposure -- 60 sec max. and had no issue.:thumbsup: see photo
The only problem, so far are the lock-screw for the ball head. The knob gets lose fast (adhesive failing):thumbsd:, causing it to rotate without un-screwing lock to the ball head (hope it make sense). The shop where we bought it actually replace the defective ball head assembly. The shop where we bought it (AP @ Funan) actually advise not to over tighten, there are two screw actually locking the ball. One good side, you can convert one of teh tri-pod leg into a mono-pod..., the weight not heavy for its design and height.
My take: the design is good, but the workmanship + the material used might be compromised, its cheap at <S$200 for a cabon fiber material. Besides I think this is China made. I am planning to get an adhesive de-bonder, clean & change the adhesive (look for an-aerobic like a thread locker), buy a good knob from Ikea, preferably metal cause some plastics are just not adhesive friendly. apart from this Im happy
Hope this helps...