I'm not here to say it isn't fun because of course it is, that is if you see it in a shop and have a bit of fun with it
After you buy it the novelty wears thin before too long
Its your choice, buy it by all means, but it will collect dust by the end of the month
Although this product isn't quiet, it's hillariously fun. My 35 year old teacher had one and use to blow peoples coursework all over the room with it. This can be used as a catapult, but highly inaccurate, and it tends to break if you misuse it. It also is inaccurate with just air. You have to aim higher to hit someone in the face with a ball of air. Just don't use it directly infront of someone's face.
It does take 5-10 mins to build but it is great fun and does fire a ball of air at least 20 feet, you can sneak up on people and fire at them, it is a blast especially if they have long hair but after that due to the noise it makes upon firing, you are no longer in stealth mode.
To sum it up buy one its great fun !!!!