Cuts vinyls very well. The pen cutter is a cool addition.Pen broke on day two. First the needle was stuck sticking out and wouldn't retract. I dropped it from a height about 8" off the ground and it finally retracted, now when clicked the needle point won't come out. The microfiber felt wore though after one days use.Excellent kit. Everything I needed except a water spraying bottle (I recommend a continuous sprayer bottle)I put uv blocking film on all the windows of my home. This kid made it easy and it looks professional. I used the bubble popping pen to pick the backing off the film at the corner. It made it SO much quicker and much less frustrating.The angle on the razor knife is very pointy. Not blunt like most razor knives. It's not something I would have even known to look for. But WOW, made a huge difference.The squeegee is flexible but still firm. Nice rounded edges didn't snag or mar my film. The felt covered side made it so easy to move across the window. (I use it on my shower doors now. They stay crystal clear with no water marks or leftover conditioner!)Good product the razor knife is perfect with it's fine tip, the vynal cutter is useful at first but you will quickly realize that the knife is more useful, squeegee is sturdy yet flexible enough to hand flat and slight curves, the air bubble pen is just infuriating I haven't found a use for it yet but for some I'm sure it has its placeIt was definitely worth what you paid for , i cut myself a couple times and one of them broke quick but it workedThese tools were extremely helpful when I was applying peel & stick wallpaper to my wall. Highly recommendThe pen pen included in the is a game changer. Great value for the money and significantly less expensive than cricut name brand with equal qualityThe pen was the only reason I bought this for but the Squeegee and that cutting tool have came in clutch more than a few times.Good quality item, quick delivery.