This is far from the best sound card on the market, but if you're still using onboard audio then this will be a huge quality improvement and for the low price of 30$ there's no reason not to. Installation was easy, drivers work perfectly fine on Windows 7 after a bit of fiddling and a few restarts. Has pins for front panel HD audio so I can have my speakers in back and headphones plugged in front and you can switch between both on the fly using the ASUS drivers.
Make sure you have audio equipment that is capable of hearing the improved quality, if you're using really low quality speakers/headphones chances are it won't make a difference.
Basically my verdict is, if you aren't an audiophile (if you are get an 80$+ sound card) and you are still using onboard, this is cheap and the sound quality boost is worth every penny.