I love this pattern. They are fun and simple to knit up and they do actually stay on. Cute and useful. The holy grail for baby knits. I also enjoy playing with the space on top of the bootie and duplicate stitching patterns onto it. To do this I just grab some graph paper and mark a rectangle that matches the size of the top of the booties (9 x 12 if memory serves) and then grab some colored pencils and have at it.
I tried a few different designs but decided to keep it modern and simple with a pink chevron pattern (the color is less red than the photo shows). I'm happy (and/or slightly disappointed) that I didn't end up with any obscene designs like the last time I did this.