Good. I used it for something other than what it was designed for and it worked perfectly.
I needed some good quality eyepiece cases to make sure that none would be broken or exposed to rough-handling, and those that I purchased from OPT fit the bill perfectly. Very pleased, indeed!
I bought this for the 25mm eyepiece that came with my Celestron Nexstar 4SE and it fit great. It easily resizes for different size eyepieces.