Ok, so I guess I'm one of those people that prefer the "metal balls" massaging me then just the vibration. The vibration massagers don't do anything for me. If anything, I think it kind of makes me nauseous. LOL.. That's why I really love the Mynt Massage Pillow. I need the Shiatsu massage more then a vibrating bed. Hahaha. I did buy a massager for a chair once, at Bed Bath & Beyond. It was a Shiatsu massager but to me, it just wasn't strong enough. Just leaning against it, you can hear and feel the "balls" clicking and grinding, as if it was trying to get traction. Therefore, I ended up giving it away to my apartment manager. Then I invested in a Rumble Roller (foam roller) with all these hard nubs. Now that, is a massager. You can add as much pressure as you want. Before the Rumble Roller, I did foam rolling on the traditional roller, again, didn't do much for me after awhile. But I wasn't as advanced on the Rumble Roller when I purchased it, so I did the softer of the versions (firm vs x-firm). Now, I am looking to upgrade to the X-Firm.
But anyway, if you really want to work out those knots and kinks, foam rolling is where it's at. No plug in, no batteries, etc. And when I want to use a massager, I take out my trusty Mynt Pillow Massager. Works great for my IT Band and calves....much more gentle then the roller in sensitive areas.