Excuse the rant, but...
As an artist (Not a professional, but not a begginer,, I hate it when people who have no idea what they're doing TRY to critique someone else's work. Look, if you're gonna comment on his stuff, go by this rule first: Can I draw this myself?
If the awnser is no, then shut up, comment on how good it is, maybe give a little tip or two, not a full-on guide on how to draw, and photoshop, written like you're the king of popular media.
If the awnser is yes, then Congratulations! You're probably a professional, and deserve to be praised. Act like one. Post your art here (proven to be yours) and THEN you can comment like a smartass.
As for my commentary, this is great, and I'd really like to know how you did the light reflections on the right wall and water. Thanks!