I got a Purse To Go because I wanted something that would completely cover the bottom of my bag and allow me easy access to my SLGs. It's light, completely protects the interior of my bags, allows me to change bags easily, and keeps me very organized, especially since I have to carry a lot of work files and paperwork and travel back and forth between offices. I believe the Chameleon works similiarly--I know many of the Hermes ladies like that one if you have 35/40 Birkin or shoulder Kelly-sized bags.