I traded a Yaris in for the Camry, lost about 8-10 MPG, but the 3.5 is a great engine.
If you want mileage, get the Yaris or Corolla.
If you want the Camry, AT LEAST get the 2.5 four.
Great power and very quiet engine.
Engine and transmission are good.
Interior is huge (compared to Yaris :) ).