I have had a 15" 2012 MBP on my mStand for over a year now. The stand is very strong. It's not going to snap under the weight of a MBP 15".
----------
No chance. I've had an mstand since they came out. It's the only accessory to travers 3 laptop generations. It's a single sheet of aluminum like half an inch thick, you could safety store the weight of several MBPs without worry.
The only risk I can see is if the laptop spun or rotated off, but the bumpers are rather grippy.
Thank you both. I think I'll get one from amazon. You know, my friend asked me: "have you ever noticed that very Apple purchase leads to other Purchases". Finally! Someone understands the Apple culture!