I've been, it's huge and a maze, but so awesome at the same time, I got lost with all the toys and got to hold an play with a D3 for a bit.
the question is it gonna be open when you go? I know they are orthodox so they are not open on Saturdays but also I'm not sure when the High Holidays are over and I know they are closed till the end of that.
But it is a photographers version of Toy'R'Us, it's an awesome store and I want to go back.