Originally Posted by beaubo
I've left stuff there and left the lounge for a few hours with no problem, but I wasn't leaving any electronics or other perceived valuables! Ideally, leave the heavy stuff and just carry your laptop, etc. with you.
I doubt if that is a safer option.
There are lockers located throughout the terminal, so you don't have to descend into Schiphol's dungeons to have your luggage stored.