The Millenium MX 1000, simply put, is the best mixer stand for the price and is better quality than some of the more expensive ones, in my opinion.
This is from experience, as I also have the K&M 42040 Mixer Stand. The K&M one locks are now sticking quite frequently, after years of use, so I decided to buy the Millenium MX 1000 for live use and leave the K&M one set up in the music room. I went for the Millennium stand because the singer in one of my bands has had this stand for many years, and has never had a problem with it. It's still as strong as when he bought it 4 years ago.
It's wide enough to stand some of the larger mixers on, e.g. Behringer X32, which both my band's singer and I both own one of each.
For it's price, I can't fault it. Definitely worth the money