I use a number of room treatment products including those from Real Traps and the defunct Eighth Nerve. I do agree they can provide improvements in sound if set up properly. The last part being the key as it can be easy to over treat a room, especially a small one. For example, in my room I tend to treat corners and seams and forgo the side reflections. You might want to go over to Audio Asylum and check out the Rives Forum. Ethan Weiner and David Aiken are two members who offer very sound advice.
One other thing though not mentioned is something I have tried with success as well. If your system and particularly your speakers allow for it, try near field listening. In this arrangement you sit very close to the speakers, maybe forming an equilateral triangle of 6 - 8'. The benefit of sitting this close is that that you potentially neutralize the room reflections and take the room out of the equation. However, some people do not prefer to sit this close and it does take some getting used to from my experience.
One other thing though not mentioned is something I have tried with success as well. If your system and particularly your speakers allow for it, try near field listening. In this arrangement you sit very close to the speakers, maybe forming an equilateral triangle of 6 - 8'. The benefit of sitting this close is that that you potentially neutralize the room reflections and take the room out of the equation. However, some people do not prefer to sit this close and it does take some getting used to from my experience.