My parents just bought one, upon my advice.
I listened to it a couple of times, and compared to the sound of the tv (a Samsung 5300 - the sound was reviewed
good for a flatscreen tv) the difference is night and day. I can't compare it to any other soundbar, as I've never heard one before
. I myself have a 5.0 system with floorstanders and an AV receiver connected by the pre-outs to a stereo amp for the fronts, so that's the other end of the spectrum to compare with.
Considering their price and modest volume of the system, I find the sound very good.
Good: sound; price; wireless subwoofer; repeater for remote control
Bad: only 2 S/PDIF's as input; few options to adjust sound (you can set the volume of the sw compared to the bar; stereo surround; clear voice on/off - that's it)
Btw here is a recent french review: http://www.lesnumeriques.com/enceintes-home-cinema/yamaha-yas-201-p15694/test.html