Techradar (Click here) tested the Sony A55: “It would be very easy to dismiss this novel design as a gimmick, but for certain photographers it will provide a real advantage. Image quality is similar to contemporary conventional SLR cameras, but the size and weight of the A55 is much reduced, making this camera ideal for those who travel extensively, or just wish their SLR was a bit smaller and lighter.” A bit strange that the verdict sounds good but the final rating is 3/5 stars only. I checked the ratings from other cameras. The Nikon D7000 got three stars and the Pentax K-5 four stars. Both cameras do share the same A55 sensor but it looks like the Pentax K-5 can squeeze out the best image quality from the sensor.
If you still do not own the Sony A55 you might take a look on the latest deals at Adorama (Click here). They are offering $100 instant rebates on many A55 double lens kits. If you need more than the kit lens only go for it!