Ad Supported Kindles - Annoying or Welcome?

In reading about the new Kindles, many of the reviewers/commentators said the ads were no big deal, since they only show up on the screensaver and when not being used for reading. In fact some people like getting the special offers from Amazon. I don't mind saving money getting the ad supported version, but I would normally pay extra to avoid ads. Any Kindle owners here have opinions on their ad supported models?