We all buy fireworks because they're fun. And this little thing is well worth its price for that reason. It's fun! Does the confetti go far? No. (But did you really expect it to?) Is it loud? Surprisingly so. Not anything close to a 500g cake (obviously), but possibly the loudest party popper I've used. Does the automatic advancing feature work? I've only used one cartridge, but yes, it does! (Again, I'm a bit surprised!) Should you buy a case? No, unless you have a store. Should you buy one for yourself? For sure! The amount of fun you get for $2 makes this a worthwhile buy. Might as well pick up a refill pack for the same price since you'll want it after using the two that came with this item.
One caution is that this would be better outside since it's rather loud and since the confetti would make a mess inside.