I’ve been really happy overall with this K&F Concept silicone sleeve for the Insta360 Go Ultra, though there are a few things worth noting.First off, the fit is perfect. It slides on snugly and feels secure once in place. The lens cap is easily my favorite part of the whole set. It fits tight, stays put, and is super easy to take on and off. This may be a small detail, but to me it makes a big difference in everyday use.The silicone sleeve itself adds a nice layer of protection from scratches and the elements, and it helps keep the camera looking new. That said, it’s not absolutely essential as the Go Ultra is pretty durable on its own.One thing to be aware of: the sleeve prevents the remote section of the camera from fully docking with the rest of the camera. It will still loosely connect magnetically, but it doesn’t securely clamp in place because the silicone adds a bit too much thickness.K&F Concept makes excellent gear overall, and this case is no exception in terms of quality and materials. However, because of the docking issue, I’m giving it four stars instead of five.Pros:- Perfect fit- Excellent, easy-to-use lens cap- Adds protection and keeps camera looking newCons:-Prevents full docking when installed