Good thinkin putting a lock on the door to keep the kidlets out...and for peace and quiet in there!
Great thinkin keeping the sump off the floor, although you will lose the cooling capacity of the concrete.
And the floor looks AWESOME!
I've actually been drooling over modern designed kitchens and living rooms that use a similar looking product on the floor to make the super high gloss white floor. So modern, so schmexy.