The Brushes Could Be Better: Nailboo's brushes are squared, which means it's a bit tough to get clean lines along the edges of your cuticles. This might not bother some people, but perfectionists like myself will miss a curved brush.
The Topcoat Is a Little Lackluster: I ended up applying two layers of topcoat, which made the drying time much longer. Don't make this mistake — one coat is enough, it's just not going to be diamond-like.
Nailboo Removal Is a B*tch: Who here is also still waiting for a lasting manicure that doesn't require a pickax for removal? I filed and then soaked my nails, as per the instructions, but was left with a strange film over the skin surrounding my nails. It wasn't the worst manicure removal I've experienced, but it certainly wasn't the best.