I am doing one of those right now. I bought four charm packs of the Martinique by Moda collection. I had kinda planned on making the quilt that Moda designed for it, but after much study, decided it was way above my skill level. There is another cute pattern, a schniddles one that I really like, but it turns out very small.
I found a tutorial for doing this online and decided I could maybe handle it. My only problem was trying to figure out which of the over forty prints to put together in a random way. I don't do random too well. I ordered more fabric and plan to do a sashing and some borders, but I have no idea what size it will end up.
I just hope it turns out somewhat as nice as I have it pictured in my head. This will be my first real quilt of any size so I am a bit worried. I have made numerous baby quilts and mini's, but nothing I can wrap up in.
Of course the piecing is just the beginning, Then I have to figure out how to quilt it. I don't even want to think about that yet.