I've come to trust K&F for many of my photography needs, and this product hits on all points.

Everything about the suction cup construction is top notch and professional quality through and through. The ARRI pin(s) on the "Magic Arm" are especially appreciated... once secured... your gear's not going anywhere.

With a couple extra "Magic Arms", you could mount several devices, thanks to a generous amount of mounting points.

The materials are excellent, and manufacturing is On Point.

I found a place to test the 60kg claim, and although I no longer have 21" arms... I applied what was easily 60kg of pulling force, but I could not pull it off... however it came right off when I released the pressure using the 2 'release grip' points.

The included 'action cam' mount is par and parcel for it's intended use/applications (nothing special but good).

The included phone mount is better than Many I've used successfully, and being made predominantly of Aluminum... it provides an extra sens of security when trusting it with your 4 digit phone(s).

If I could whine about anything with this product, it would be that it should have come with some sort of Zippered Hard Shell Case, that would protect all of the surfaces and openings from dust and debris so they're always ready to go when you are. A zippered hard shell nylon case would have made this purchase pretty much perfect.... maybe just my .02... at least they included a dust cover to protect the cup itself.

All things being equal, this is a top tier, top quality, professional grade piece of equipment that (if used correctly) should never let you down.

I hope this helps.