Good morning all! Today, I have my new favorite french base. I've done a lot of swatches recently of colors that would work well in this capacity. However, 10's Pinky Promise is incredible. Of course, it's very sheer. It is basically like having a polish that will cover your nail's imperfections while letting them shine through naturally. The brush was great, but the formula was the real star! It went on beautifully with no streaking or drag. And the best part is that it is totally forgiving! Need a few more brush strokes? She says, no worries! Go right ahead and brush away...oh, and I'll level myself right back out with no problem! So sweet! Love, love, love! The only potential problem I see: I'm pretty lucky that my nails are not yellow or stained. As this is super sheer, it may not work well to hide badly stained nails.