Should I buy a 2009 Subaru impreza?

I'm 18 and am going on my 4th car because I can't seem to find a reliable one. However, I found a nice 09 impreza for sale with only 10k miles! So my question is, is this a reliable car to buy? It is the 2.5i sedan with a sunroof and 10 speaker, 6 disc cd changer and automatic transmission. I need a reliable car for college but also want fun. So does this car get good gas mileage and does anyone know how the premium stereo is? Thanks for all the help!!