Okay, so I got my Feisol tripod and ball head yesterday so heres a mini review. Really haven't had it long enough to do full.
It is important to remember that this is my first decent tripod and first ball head use.
First impression is mixed to be honest. But I think some of those mixed feeling is not really knowing what to expect or look for.
It is light!! And I think it is going to good and stable also. I have had my camera+ grip and my Sigma 100-300f/4 mounted so that is about the max weight of the gear I have. I know it will handle that easily and then some. I think the ball head is overkill for me but it is sweet to operate. I didn't know what I was missing not using a ball head before. Soooo easy and smooth to adjust.
Great low profile without center column.
The three things I have noticed that I don't like is the twist locks are not keyed so set up is not going to be a fast as those that are. Twist lock release is not very smooth. Maybe just a bit stiff but might loosen up after a little use. Finish is much like that of Giottos Lava series a little ruff. (not that I don't like that but may be cause of stiffness ) Third is, there are no set screws for ball head.
I purchased a center column thinking I might need a couple more inches heigth but I won't be using it. I am only 5' 9" and the tripod as 51.9 inches and with the head and camera+ grip puts it above eye level. I don't know why my math didn't match up and it still doesn't but...
For specs, please refer to links.
Feisol CT 3401 Tripod Feisol CD-50B ball head w/QR plate
Give me a couple weeks of use and I will be a bit more thorough. If you have any questions I will try to answer.