I've become quite proficient at changing shields on my Arai SZ Ram 3 open face helmet. This one requires you pop off the shield, then remove the sidecups and install them on the other shield before installing the other shield.
Hang on, I'll time myself... 1:48
Still nowhere near the 11 seconds it takes to change the OGK shield.
No quick change on this model. I picked it up last week. Ordered when I bought the 125, but this helmet is intended for the dual-purpose/ADV riders. It fogs easier, but I have been spoiled by my Scorpion. I think I can adapt a Pro-Shield to curb the fogging. I am very impressed with it so far though.