Customer Reviews: Real ImpressiveDecember 18, 2009 Chocohockeyholic(Lakewood, CA USA) The instructions were somewhat lacking, but once you get the balloon up it's really impressive. Even adults think it's cool and adds so much to the decor. The only negative is that for the balloon to stand you have to fill it up with helium and it takes quite a bit of helium. It's a good thing we rented a large tank. Also, you're not to fill the legs with any type of air. They stay flat. Given the amount of helium, you'll also need to attach your own weights. The weights provided are certainly not enough to keep it grounded. Once filled, the balloon will stay afloat for quite a long time. It's going on just about a week for us now and still doesn't seem to be losing air.