Handbag "organizers"

Does anyone recommend a handbag organizer like the one by Lori Greiner? I have two handbags that are pretty much unususable for me due to the lack of structure and inner pockets (a big slouchy B Mak satchel with only one outer pocket for example). I would want to organizer so that I can find my keys and wallet easier. I don't know if it will make the bag just too heavy and "full" though even when empty. It sort of seems like you are stuffing a whole additional purse inside a purse which seems bulky and heavy to me. Does anyone have any comments on either the SG one or another recommendation?