Subscribe to my comments

I have just installed a new plugin for my wordpress blog. I first saw it when I visited Healthy WebDesign for a completely different reason. I noticed that when I was going to leave my comment, it was a form where I was asked if I wanted to subscribe to any followup comments. I did it, and it was amazing (at least for me). I received an e-mail notification when somebody else wrote a comment to the same post that I commented. This way I came back to the site and did a followup comment and again I received a new e-mail when another comment came and so on. So, only a few minutes ago, I installed the same plugin (at least I think it´s the same). I found it here, but I have no idea if it works. It took me about 1 minute to install it, and I am very excited to see it in action.