It seems a little simple is all. I would suggest sprucing up the images and the overall design in general. Maybe add some graded backgrounds, and some rounded edges here and there. The top buttons do not seem to fit into the overall design of the website.
The main thing, and the most important thing when it comes to design is to make certain the site flows nicely. If the site flows nicely, then the viewers eyes will flow with it, and therefore you will have a visitor staying with your site and not moving onto the next best thing.
Hope this helps.