The only thing that I'm disappointed about is that I hadn't installed this sooner especially considering that it's been around for a long time.
I love it. I use a large font size for the DOM Inspector and in order to see the full path and/or value, I have to either drag the divider over to the left to reveal it, or squint to read it in the tooltip. It's also just a much better way to view and interact with the DOM Inspector.
Having used this going back to the default layout is like wading waist deep through treacle. I've changed the version support number several platforms for Firefox 4 with no problem. I'm sure your flat out on NNL but I hope you keep supporting this.
Chris, Thanks for going to the trouble to write your review. If I could ask a favor: I'm trying to get this approved public but that requires two or three somewhat-detailed reviews. One-liners are not sufficient (which is why an editor deleted your previous review). If you don't mind, could you say a little more and then I can renominate for public release.
(I realize this add-on doesn't do much, which is why I liked your previous comment and thought it was perfect.)