Works good and smooth

Yes, you can hear your PC desktop or laptop audio through this app, as if it were an external speaker. Actually you can mute you PC speaker as it plays music, and this apps sound device works separately (PC volume and iPhone volume control differently the same PC music with no problems). It works good as long as it is within WiFi range (no 3G allowed). Easy to set up and use, seems stable. Works in the background when you change to other apps.

requet about RemoteSound - Using the iOS device as PC Speaker