I have the brown bows one withe cupcake on the front and I love it!
It fits everything inside, loads of pockets for all babys bits and my purse and phone fit in there nicely too.
They come with a changing mat which is a fab bit of kit and a dirty nappy bag which has come in handy for me lots of times! I say go for it, I couldnt recommend them enough.
And...they are nicer than the average changing bag...I love carrying mine to the baby changing room with me!