Adidas Energy Boost Running Shoes - Men's 10.5 - Neon Yellow/Black

1)  These shoes run about a half size small, so they may be your size.  I just overcompensated.  If you wear a size 10 in most shoes, these should be right for you.

2)  Regarding your question as to whether they are the real deal:  I think they are.  My legs and feet feel much fresher in the later miles of long runs with these shoes than others I have worn in the last few years.  They also feel more uniform under foot from heel to toe than other shoes, if that makes sense.  Very smooth.  I am wearing them next week in Vegas and not giving it a second thought over my other shoes for that distance.