BUY IT! Trust me it's a game changer & you need it! The spray makes it very easy to get just a little bit to fix a slightly sticky/tacky slime, without having to worry about too much squirting out of a regular bottle, which most companies use for their pre-made activator. No more accidentally over activating due to spills! The spray also distributes it pretty evenly across the face of the slime, so you don't have to worry about activator dripping all over the place like you do when using drops. It's larger than what most shops sell, but for the same price, and the packaging is just the cutest ever.