Works well, GB40 stays secure. Accessories will dangle a little. My pen broke today and I've been wearing it at least 5 days a week since April 15, 2017. The seams didn't come undone, the handle was torn. Not very high quality, another instance of YMMV. I used mine five days a week and carried it everywhere to use. Protected the device well, just not for long as I had hoped. Less than a year of use. :(