I was about 35 feet high Sunday night rocking like a baby with the wind. The only reason I didn't go higher was because the leaves havent fallen and cleared enough yet. I have gotten up to about 40 to 45 feet with it before without thinking twice. If the tree gets thin I just adjust the leveler on the back and keep going. It really bites into the bark and I use a ratchet strap to secure it once I'm at height. Once I'm set it's rock solid. I have the standing platform attached most of the time and it's nice to be able to stand up when I want to streach out. Also when you need to turn around just step onto the platform and turn around. The longest I've been in it has been 6 hours. But I have a friend who has spent his entire day in one without breaking a sweat. If you get one let me know and I can give you some tips on how to make it even quieter and easier to use. In short it's a really good stand thats made to last.