I really liked this pattern but I would definitely make this taller and wider in future projects. Also, I might try to make the stitches a bit tighter so you see a little less between the holes, etc.
The pattern itself worked up super quick and really was pretty. There are suggestions on how to modify the pattern and general suggestions in the comments section. I highly recommend reading through those since the pattern creator was super helpful to people that asked questions within the page comments.
I have a few more of these in my queue for some friends and family so i'll be making modifications. I didn't end up adding buttons because I felt like with the dark yarn I used, the shells stitching didn't really stand out as much as I thought it would. I liked the more uniform look.
Pattern link: http://idesignadventures.blogspot.com/2011/10/leg-warmers.html
My Ravelry project link (hook and yarn info): http://ravel.me/redredpanda/lw