I've had a few Castelli gloves over the years and decided to try these when they went on sale. But they have a few good things going for them. The palm is nice and tacky for bar contact. The finger pulls are definitely a nice touch - having struggled with most other snug-fitting gloves to pull them off, this is a very nice design feature.
One other surprise, not good - they stretch, a lot. I normally wear 2XL in Castelli gloves. But these gloves stretched so much my hands were sliding around inside the glove. I exchanged these for the XL and while snug first time, they have given just enough to be the right size.
At the regular retail price, these gloves are definitely over-priced. But on sale, they are a reasonable purchase once you get the right size. I probably won't be using these all the time in place of my regular PI gloves, but they're a nice addition.