Yes, vitamin A is something you want to worry about, but the supplement you point to has Beta Carotene, which is a vitamin A precursor (aka provitamin A), namely something that your body converts to A. As Wikipedia puts it, “β-Carotene, a precursor form of vitamin A typical of vegetable sources such as carrots, is selectively converted into retinoids, so it does not cause hypervitaminosis A; however, overconsumption can cause carotenosis, a benign condition in which the skin turns orange. The proportion of carotenoids absorbed decreases as dietary intake increases.” In short, you’d have to consume excessive amounts of Beta-Carotene to overdose, and it’d just cause your skin to become orange.
The same wikipedia article, though, does warn of excessive consumption of synthetic Beta-Carotene. If we’re going to use supplements, I think it’d be preferable to get our vitamin A as preformed vitamin A, which I believe only come from animal sources. The NIH’s dietary reference on vitamins ([http://ods.od.nih.gov/Health_Information/Dietary_Reference_Intakes.aspx]) says “Beta-carotene supplements are advised only to serve as a provitamin A source for individuals at risk of vitamin A deficiency.”