Volume Leveling

Has anyone used these volume leveling adaptors?

I recently bought one of those Sony home theater in a box easy set up deals, and I'm afraid the bass is going to keep the kid awake, so I usually turn it down at night and then back up that next evening. At least that's the plan I end up forgetting to turn it back up so basically I'm not utilizing my bass at all.

I've been thinking about buying a MyVolume Leveling Adaptor that way I wouldn't have to mess with the bass levels on a daily basis, has anyone used one of these? I'm wrestling over whether or not I should get it or just keep my bass down.