I've been using their Sun Sleeves for a few years now. What a great way to block sun exposure on the arms and, especially, on the back of the hands. As both a tennis and pickleball player, I can also confirm that I find no interference with griping the racquet/paddle, or with "feeling" the ball on the racquet/paddle.
Now, with the vented versions of the Sun Sleeves, they really are cooler to wear due to the increased air flow on your skin.
I have purchases several pairs of the original sun sleeves and have been very happy with them. They are comfortable and well made. I was very excited to see the “vented” style as the weather has been so hot. The venting does help with cooling, but the mesh area is very narrow. I think if the mesh was wider it would facilitate a cooler and more comfortable wear.