Someone must have an opinion on it. :o/

I hesitated to comment on this because we don't know what elements you have the right to change. Could you be more specific about that?

Absent that info, my first reaction was that the font for Retro isn't nearly retro enough, and it's much too thin. I'd use something like Electric Boots for the 40s, one of the Hamburger joint faces or a neon look for the 50s, Cooper Bold for the 60s (rather than anytihing too psychedelic, unless your client is okay with that) and so on. Is there a particular era they're focusing on, or will each shop have something different? If there will be a lot of different definitions of "retro," it might be best to go with a generic has-been face like Cooper, as long as it has some heft to it.

The rest of the poster seems kind of ditsy and busy to me. Too many little pictures of things floating around, with selling points just lost. The body fonts you've chosen (stick to ONE) are also too light, in my opinion.

The "COOL CLASSIC KITSCH" tag could be more effective maybe stripped across the bottom, either just above or reversed out of the blue, and in the same font as "Retro," no punctuation. I have a feeling you're going to tell us the blue bottom area has to stay as it is, though. If so, you at least need to give the word "together" some help. Complimentary colors don't play nicely together in the case of a warm colored typeface on a cool colored backround of the same intensity (chroma). It's a "color recession" issue.

That help any?

Mara

The bottom "blue bar" is the one element that I was asked to include by the brand department. The colours (magenta and blue) are part of the brand style and cannot be changed including the colour of the 'Together".

Again the "Retro" is one of the fonts specified and could not be changed.
The "Cool, Classic, Kitsch" to fall in with the guidelines was made a different font from the body as requested by the branding dept.

So the fonts are dictated, as is the style of imagery you can use (7 other images that I considered more appropriate were rejected for not fitting in with the corporate image)...

We tried ;-) Another candidate for the Client Hall of Shame, I guess

Mara

I'd have the circles of blue either removed or going off the page rather than on it. I'd not have floating objects. Add some drop shadows or something, they just look weird floating on the page. Look at ads from the 60s-70s for inspiration. Make your 3 words, "cool, blah blah" BIG-- grab the attention of your audience. Make Retro smaller. Put a freaking cancer ribbon on there for pete's sake. I stop in my tracks when I know something is for cancer research-- nothing you have there calls that out except the little bity blue bar on bottom.
Break your text up in pauses so that it's easier to read-- rather than breaking up mid thought.

That's all I've got right now. Get to work!!

I can't see retro feeling on the layout. It comes not thruth. Sorry.

You have an extra "at" in your copy:

great range of clothing at

at incredible affordable prices

Mara