My initial impression is that the legs are very stable (much better than my Manfrotto legs). I only mounted my 5D/24-70 on it though. I will do some tests with my 70-200 f/2.8 IS tonight to see how it reacts to a larger lens. I actually have a good test in mind that will allow you to see the stability between the two. Stay tuned!
The legs do lock outwards, and at various angles in between. I'll get some more pictures posted tonight showing how low it gets.
Wonderful, looking forward to it!! 



