Really excellent. No problems with chmod permissions, just walks through the installation as expected. That's the way I like it :) http://youtu.be/oYTRWjM4s4E?t=48s
I use this add-on all the time since I first tried it out. Saves me time on checking all 20 of my installed add-ons and I love how I can install via resource url, zip file, or good ol' xml.
This really speeds up add-on installation, upgrades, and removal, and it's reliable to boot. It's one of those add-ons that deserves to be merged upstream!