I don't think that this IS-max is a top quality helmet either, but pretty decent for the price. I got a chance to play with about 15 different ones in the various shops i went to while helmet shopping, i found that maybe 4 or 5 of them had dodgy shutting mechanisms. Some had broken locking tabs, some were bent, some didn't line up properly when closing etc... I'd say some of that is down to people playing with the display models all day and some of it is down to inconsistencies in the construction. Either way i made sure i got a fresh one out of the box and i inspected it thoroughly before buying. I'd suggest you and euphonious do the same!