This update is out and it's pretty neat. Of course your system needs to be fast enough to run the new 3D interface and emulate the game at the same time, but if my old relic can handle it then you should be fine. Some decent customization options for filtering, scan lines, full screen or simulated CRT. There is a shelf on the side that holds your games and...man, when you only have a few games you want to grab more to fill it up haha.
The various game bundles on Steam are on sale right now until the 1st, such as
this big pack for $20. It is strangely tempting even though I already can emulate all of these games if I wanted.