I picked up the Seven Deadly Sins Kolinksy set and have been using them for a few days now.
1. The brushes are well-packaged. I like the carry case/brush stand that they came in. The brushes are held securely and don't fall out.
2. These brushes have the best tip of any brush I've ever seen. I was doing 000 work with the size 2, no problem. I even managed to freehand chainmail with the size 0. After a couple hours of use, all of the brushes looked like I had just taken them out of the package, and I am ROUGH with my brushes.
3. The flow is amazing. I liken it to wizardry; I only have to THINK about where I want the paint, and there it is, with hardly any pressure required. I painted some NMM trim on a model that would have been infinitely frustrating previously and it was smooth and fast. I only wish the size 2 had a SLIGHTLY bigger belly. The paint flows so well that I find myself refilling the brush pretty frequently.
4. They feel good in the hand, although I would like them to be just a tad heavier. I like to KNOW that I'm holding something.
Definitely happy with my purchase, and will likely be ordering and trying out the 4 Musketeers line of Sable brushes and the Synthetic 7DS for my less-strenuous workload. Well done, keep making quality products and you'll have a customer for life!