I use 0.2.1 and it seems to work pretty well, though it doesn't do a perfect job of blocking ads. Now I would never expect a perfect adblocker, but I do expect ad blockers to allow you to make simple adjustments to them in the event that an ad slips through. I simply see no reason that such functionality should be left out. However, the developer of Safari Adblock disagrees. All we need is a simple right-click > block image option, and then a text field to add wildcards. That's it. But you won't be finding that feature in this program any time soon, judging by what it says on the site's FAQ:
"How do I modify Safari AdBlock's filters?
You don't."
Well hey, thanks. I love having zero control over a plugin that has a direct effect on the web pages I view. I emailed the developer about a month ago asking about this - no response.

The instant I get PithHelmet to work on Safari 3 in Leopard is the instant that I permanently ditch this plugin. It would be great if the developer wasn't so adamant in his stance that we shouldn't be allowed to manually add blacklists. Oh well.