Hi glenn,
Looks like a good invention to not to get dirty when opening a bolt.
I am sure you had that experience where the oil drip down you arm after not moving the bolt fast enough as it was coming off the last part of the thread.
I wonder how well the value will hold up and not leak later on as the oil get hot in the pan and wear n tear under the vehicle?
I've read good reviews on this valve with no leaking after 5+ years. I've had oil running down my arm as well, which is one reason I got this valve. It is much cleaner.