Noice! B^) Shading and composition are spot on as always, you really have an eye for setting your drawings up in a perfect way. This one's especially interesting because I'm not used to see your work with such thin lines. I wouldn't say I like it as much but it's cool to see you try some new things. Honestly, all critique I've got is that everything looks a bit *too* shiny. Although you did a great job on shading, I personally feel you went a bit too dramatic for this piece but it's nothing that bad. Your friend must looove this one.
Keep up the great work, brah.