You picked just the right shiny wall to use. How does the scene look without the people? I'm not sure if they help or not. I might have been cool if they'd been walking away from you.
I like the creation of false parallel lines via the reflection, I think its an interesting twist on the challenge. Composition is good. However something seems a wee bit 'flat' about the image, I'm not sure what it is. Perhaps it would've been better in B&W with a touch of contrast. I also would've preferred it without the people, but that's down to personal preference.
Greater DOF might've made the 'vanishing point' seem more significant.