[Lever] Works very good with heavy short lenses and with my SAL70400 (Sony G lens 70-400 mm). Extremely smooth movement of the ball head and the break knob. It is very satisfying and fun to work with.

[Lever] This head is fabulous. Very stable. Very smooth. Solidly built. Some have mentioned that they did not like the quick release flip lock lever's safety switch. However, I find it comforting to know that you can't accidentally snag the flip lock lever and release the plate. Once you're used to sliding the tiny switch, it is just as fast and easy to operate as any other quick release flip lock, IMHO. The head is VERY stable and the controls are simple, functional and reliable. My only minor complaint is the pan adjustment knob's very close proximity to the main adjustment knob. It is nice to have them close, I'm just not sure I would've put them that close. Still deserves five stars as far as I'm concerned.

[Lever] I like this shape,so good.I changed head clamp. But M6 screw was very hard.....

[Lever] I use this Monoball Z1 a few years with Nikon 300mm lens. It is quick release and lock as it said. It does not easily slip like others.

[Yes] Just got back from a few weeks of a hiking trip in Patagonia. I actually brought two ball heads (this and a manfrotto 054) and tried them under similar circumstances. Good things- I love the simple design. I carry my tripod on the side of my backpack. The monoball seemed pretty rugged during the entire trip and didn't have a lot of parts to get snagged on branches. Once the monoball is set up right, I the monoball is incredibly solid, even in 40-50 MPH winds. I also liked that I could have a longer bracket for more stabilty on my sigma 50-500 lens and a smaller bracket for the camera to use with smaller lenses. All in all, I did feel that when set up right and locked in, it was easier to use and had a bit more stability than the manfrotto. Downsides. The quick release is quirky at times. I was using fingerless gloves but it still took a lot of dexterity. As comparison, the manfrotto has a much easier release. If you are having to take your camera on and off a tripod quickly or repetitively, it may not be the best system. Also, I'd agree with others- the instruction booklet that comes with this isn't that helpful. Finally, if you do take this out into the field, don't forget to bring your allen wrenches. I did have my plate loosen from my lens one time. Compared to the manfrotto which you can just retighten with your fingers, you need to have an allen wrench to retighten these.

[0.7 lb] This is my 3rd Arca-swiss since 1996. It is the best in the business. They can withstand a heavy impact. The last one fell on a rock and it still works OK. The quick release is a real plus. Only the last step you have to use your finger nail to get it to work.

[0.7 lb] I've found this tripod head to function extremely well and found it capable of supporting heavy and imbalanced loads with ease. I especially like the double-locking action of the quick release, so that I can't accidentally drop my camera when adjusting the plate. The small dial on the tension knob also allows setting a minimum friction, which is another fantastic fantastic feature that prevents the ball head from falling over at slack tension. Super solid.

[Lever] It exceeded my expectations. The ballhead is smooth, precise and well built. Using it with my RRS TVC-33 offers excellent stability for longer exposures!

[0.7 lb] You are hanging $5K + on it if you have good equipment, don't skimp on the ball head. We've tried them all - RRS, Gitzo, and AcraTech - none come close to the construction and solidity of the Arca-Swiss. Yes, it is expensive, and yes, its a bit heavy, but you clearly get what you pay for. We hang Canon 1 series and Nikon D3 series bodies with heavy lenses on this head all day and have never had a single issue. One of the best pieces of hardware we own. Skip the rest, get this head!

[0.7 lb] Top quality Ball Head. This is what you'd expect from swiss made. I use this on my Gitzo 2531 and it's simply perfect. The instruction is poor but simple enough to fiqure out. I am glad I got the Flip-lock quick release. Once I figured out how to adjust the lock (thanks to robert white on youtube)It has been working flawlessly and Fast. It can accomodate my Kirk L Bracket.