Here's mine running Sonar X2 audio software and Scufham S-Gear amp simulation.
OK here is a picture of the strap with my hand inserted. It's been on for almost 2 years with no problem at all. It does make it a tight fit into the case I have for it but not a problem. As you can see I am holding the Xoom out in mid-air. Never dropped it yet The Xoom case is soo slick you need something like this. I don't know how slick the Surface Pro is but I may do the same thing for it.
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I am trying to upload a jpeg and nothing happens. What is the secret to uploading photos. I am on win8 x64