I've had Nubar's porcelain base coat and Diamont for a while, but haven't been using them. I finally broke down and ordered a color from their new Fortress collection. Because I really *heart* grey polishes. I will tell you that I still prefer Seche Vite top coat, even if it does shrink a little. I started with two coats of Stronghold.
It's gorgeous, and it's pretty much opaque on the first coat, but I did a second coat to ensure no streaks. There was a little naked nail on the first go around.
I liked it, but I also wanted to play with the Konad. It was grey and rainy, so I went with silver clouds. Ooooh. Aaaah.
I did use Diamont over the Konad. I also sat for 30 minutes while it dried completely.