I had two, and just bought two more Tama MS205BK, their "low end" stand. I've had the two for many years, and consider them my best stands.
I bought two more since while working a job where we were using many Ear Trumpet Labs mics, one hanging over a resonator guitar, and one on a boom. The boom was one of my older mid-level K&M. First set, droop, droop, droop.
During intermission, I took a great "fix" for drooping stands from here on PSW - take the pivot apart, clean metal surfaces, and thoroughly clean the rubber friction pieces. I used some Windex Wipes that I keep handy for my iPad and iGlasses. The rubber discs mostly build up scraped up rubber particles that get in the way of the stable friction surfaces. The second set, the boom stayed put, though I did have to gorilla the t-nut to make it so.
I've NEVER had a Tama slip - and never had to "over tighten". The design is superior to anything else on the market. The tour Iron Works series improve on that pivot.
If you have any heavy mics on the end of a boom, use a Tama.