As every Bond fan knows, there are a lot of covers on YouTube of the theme songs (both vocal and instrumental). I wanted to know if any of my fellow Bond fans had seen any of the Skyfall ones and your opinion of them.

My favorite instrumental cover is by a violinist named Caroline Campbell. My favorite vocal covers are a group called Spanish Harlem, and the Russian Army Choir (and no I am not making the later group up).

So, opinions anyone?