PROS:

• The silicone texture feels pretty durable and high quality
• It gives my hand a nice, controlled grip while drawing
• It stops your pencil from rolling around
• Magnets feel feel pretty strong -- once your pencil is anywhere near the magnetic sweet spot on the iPad Pro, it’ll lock into position. Once it’s attached, you can flip your iPad upside down and the pencil should stay attached, even with some light shaking.
• Fits very snug on the Pencil

CONS:

• It's a great product, I do not have any bad points.