Beginner Gardening: Anyone tried the Aqua Globes?, 1 by Lady_Zoe

Lady_Zoe wrote:
I haven't tried these, but I'm intrigued by them. My family will be away from home for a couple of weeks in July (vacation), and if I can avoid having someone come over to my house to water plants for me, that'd be great! I am always leery of buying anything from a tv commercial (my son saw the commercial and told me about these Aqua Globes.). Has anyone used them, and if so, how effective are the claims that these glass globes will water for up to two weeks?