I think it's worth it! I have already bought the DVDs, but the episodes are in the wrong order on my copy. That problem is supposed to be fixed now per one of the producers. Amazon was making them with the order they aired which was incorrect. (there would be characters one week that seemed like they already had stories going, which they did, and then you'd meet them in later episodes. It didn't affect my enjoyment of the show, but it was annoying!)
I am seriously considering buying another set now that the episodes are said to be in the intended order and give my mom the first set. She likes the show too and I don't think she'd be too fussed about the order.