I'm about to work on some basic SEO for my EE site. I'm trying to dynamically set the title, meta description, OpenGraph tags, and do XML Sitemaps. I've already started trying to dynamically set the title and meta description -- with a lot of if-conditions. It's starting to get ugly.

I've been looking at <http://ee-garage.com/nsm-better-meta>. Any comments about this addon? Are there other addons I should be looking at?