I bought this helmet for a LARP.  I used foam to fit my head properly in it and was successful in playing for 6 straight hours taking it off and on with ease.  The only problem I had is that the edges are a little rough.  I used duct tape to cover all the edges properly and even took a hit to the head with no problems.

Everyone loved it and I am really happy with it.  It does rust easily so make sure you take good care of it.  Despite the edges issue I give this helmet 5 stars because it looks great and is wearable if you make sure to use foam and padding properly.