I agree with Waffles, sometimes you can find better deals than those on the store, besides it's quite comfy to shop sitting in your chair (or lazy if you want). Besides the shopping can be done a bits faster perhaps, but yes, like rightly Robert mentioned, I wouldn't buy clothes or shoes, sometimes sizes may come a bit weird. But there are sites that are just scam so it's better to buy on certified sites or do a little research before buying anything. And read the small letters very carefully also helps!

Shopping over the internet is more convent for some people, I wouldn't recommend buying clothes though. You can't try them on until you actually get them in the mail. Which would stink if you live nowhere near a store where you ordered them from. Other then that is fun.

Shopping on the internet does not have the immediacy of actually going to a store, but you can often times find much better deals on items. Overall, I am a fan. The internet is a great place to buy low to moderately priced items, and learn about products and bands before you buy.