pxls2prnt

Good call. I didn't even notice that it was an "Apple Promotion." 

I concur with the others...the 3D effect isn't really working well in my opinion. At least not when compared to the rest of the artwork with the cow. 
 
Also, watch out for the small things. I keep getting distracted by the little tiny piece of dark blue "shadow" to the left of the upper swoosh on the "L," as well as the very tiny white dot in the space between the "g" and the "á." You could probably lose both of those from the design and no one would be the wiser.

Watch the kerning in the word AZTEC. As they sit now, there is too much of a tangent between the A and Z; they are just barely kissing. They either need to be really pulled together so that they overlap a bit and form one distinct shape, or spread apart so there is a gap between them, similar to the other letters. Also, the E and C could probably be brought a touch closer together as well.

I'm assuming you mean to inform them the background of the Facebook icon needs to be widened to be square, and not the icon background placed in the back of the poster, correct?
 
I'd also point out that you likely don't need the "https://www." bit before the rest of the URL. Most browsers these days should auto populate that when you type in the URL. That would make the poster much easier to read quickly, and would help make the whole thing look less cluttered.

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion." 

Good call. I didn't even notice that it was an "Apple Promotion."