The brush is just right for me. I like nail colors with a brush like this rather than those with wider or bigger brushes. For me, the hardest part on painting my nails is applying on the edges, where I always fail and repeat, but with this I was able to paint perfectly.
The consistency of this is not thick, which I prefer on nail polishes, that it is easily glides on my nails without forming bulges and bubbles. It also dries fast so I don't have to wait for too long to do other tasks.
The scent is similar to other nail polishes but it'll be gone when it gets dry. It is best not to inhale the scent if possible. You can also use mask when applying nail polish, like I do. The scent may cause nausea or headache.

To see full review and swatches visit my blog entry @ http://www.diaryofaiko.com/2017/12/review-daiso-nail-color-little-twin.html