I played with Black Diamond tips for last year (changed 4-5 tips), and i think they are good tips for the money, they are medium, but tend to get a bit harder in time. I like them more than Ultraskin, they hold chalk well, and feel nice. What I don't like is when the tip get low, it starts to get chipped, when you use power draw shots. Maybe leather is not the best quality or too much adhesive using to hold layers together, or maybe I just have to change the tip earlier
Here are real photos of the tips I purchased
Here is a black diamond tip I put on one of my shafts. Sorry for the picture quality.