Absolutely worth the money for the Pro version. Easy to use and fast. Had a problem with Bing not seeing sitemaps (didn't fully read the manual) and within minutes of posting my support request I had the fix in hand (very early in the AM, I might add!). Great job!
I bought this plugin a couple of years ago and love what it does for my seo. I've had several questions over this time and Matthias has been very fast in answering and has always sorted the problem out (which was me both times). I can't recommend highly enough!
I've used this plugin for several months and it's one of the easiest to configure and use plugins I've tried. Recently though the Facebook buttons have disappeared and I can't get them to display any longer. Help!
Please specify the URL of your site with a problem in the comments on the support page and I will try to help you.