I like many things about it. The room design and decor are well-thought out. The overly-minimalist style, particularly the bright-white everywhere, does make it easy to make a boring scene, though. The wall hanging does spice it up a bit, but it also seems out of place. I think a glass sculpture would go better, for example.
My biggest issue is the lighting. Your shadows just aren't ... well, there. I can see under the table that you've enabled shadows in the render, but in general it looks shadowless. I'm guessing you used a hemi light. Reduce the size of the hemi and maybe turn down how bright the light is. With all the bright-white in the scene, it's a bit overwhelming to have light apparently coming from everywhere. Also, there's a way to change the reflect surfaces (the steel of the chairs) such that it continues to be reflective, but less mirror-like. I don't know how to do that in your program, though.