I'm not a professional, but I've been doing my nails myself for at least 3 years. I've tried various products. I don't know why they have received so many bad reviews. For me, they are perfectly fine! In fact, they have more useful shapes than others that are more expensive. They have made the preparation of my nail plate and the skin / cuticles very easy! I believe that every hand is simply different! Maybe they don't suit everyone! Also, for a professional who uses them more often, they might wear out differently! I don't know. For me, they are great, really! ?

Not all the frizzies fit in the wheel I have, they are larger...
I bought the set mainly for the drill and it doesn't fit in my wheel.. out of the rest, there are maybe 2-3 that are very thin/small and you can do small details