Summary: If you are looking for a head banging noise maker that makes your ears bleed then this unit is not for you. But, if you looking for a nice small compact unit that will merely enhance your music and movie viewing then this unit is for you.
Summary: I purchased this subwoofer back in 2008, and it is still going strong now in 2012. The reason I purchased it was to complement the Yamaha soundbar I hung on my wall. The speaker turns on and off along with the soundbar, so I don't need to manually turn it on or off every time I want some base.
Summary: I had been shopping for a great low in sound for a small stereo system in a confined area. I wanted my cake and eat it to. I got it in the Yamahah YST-FSW100. The beauty of its slim line design couple with the great bass sound, gave me everything I was looking for in a small subwoofer.
Summary: great small woofer for the $$. defined bass, fills up our 17 x 35 foot room nicely with a 5.1 in-wall system, onkyo receiver. have only tried music, not movies. caveats: I am a 40-something white male who doesn't bang my head against the wall.
Summary: My rating is based on use of this subwoofer with the Yamaha soundbar. As noted by others it will not rattle your house. However, it is a good performer for a small to medium-sized room. I am using my YST-FSW100 with a Yamaha YSP-3050 soundbar.
Summary: What this subwoofer is great for: If you are looking for compact subwoofer that you can hide in a corner, but still get great bass from to fill in the low end of your favorite movie's sound effects, this is it. The bass out of this subwoofer is tight and clean.
Summary: There are better subs but none better in this price range. I use the FSW100 with the Yamaha YSP-1100 and it provides just enough bass. It will not provide the bone crushing bass needed for hard core rap fans or for the head banger types. Then again, that's not my usage.