I bought my first Prius in 2006 and loved it!! Traded that one in for a 2010 Prius because I wanted the sun roof.
I loved that so much we just bought a second 2010 Prius!! I went from spending 150/month on gas back in 2006 when I drove my Honda Oddysey to only spending between $40 - $45/month. Even back when gas hit >$4 a gallon, I was still only spending about $50/month!!
Very comfortable car and people who've ridden in the back love all the leg room.
I wouldn't hesitate to buy one - especially with the gas prices on the rise.