My set is similar to the one in the link, but it's Victor compatable. Just means I can use Victor parts and assesories. If you buy the Harbor Freight model, be sure you can get tips for it. I was told that they don't fit off brands and are hard to find, but I don't know this for sure.
My bottles were brand new when I bought the kit. The welding supply company that I get my gas froms took them and gave me replacement bottles. No paperwork, they just take the brand new ones and give me old ones with gas. When they are empty, I get another old bottle. Sometimes teh gas bottle has a valve on it, some times it takes the little square wrench.
It works great for small prjects, cutting off bolt heads or metal, but not for heating up thick stuff to bend. You just can't get enough heat to bend large half inch stock very well. I like how portable it is too. I've carried it out to my dozer to cut off a bolt that wouldn't come off when I broke down. That alone really made it worthwhile.
Eddie