Purchased this car in 2004 when our daughter left for college and we no longer needed the room of our Acura MDX. Also had sold a pop-up trailer and no longer needed a vehicle capable of towing it. The Infinity was selected because it offered a similar level of creature comforts (leather, Bose stereo, climate control and power everything), but had a fuel-efficient 4 cylinder engine.
I like the styling, air dams, alloy wheels, overall lines of the car. Very comfortable and well built. Leather seats are comfortable on long trips. Generally handles very well, but the suspension does not take bumps well. Have to slow WAY down for speed bumps.
Sound system works well, but could use a subwoofer as bass is all the way up for most CDs. Road noise is minimal. Moon roof operates well, but don't drive with open over 45 mph unless you enjoy a wind tunnel. Climate control is a little uneven and does not compare favorably with that in the Acura MDX. I frequently have to make manual adjustments to mode, fan speed, etc. whereas the in Acura I just set it and drove.
Gas mileage is good; about 26 MPG in town and up to 35 on the highway. However, the car is underpowered, even compared to other 4 cylinder models I've owned (we currently also have a Subaru Forester and Nissan Sentra, both standard transmission, both better performers). May be the auto transmission gear ratios. Seems to take forever to get from 0 to 50 MPH. A standard transmission would probably be a significant improvement, as would, I suspect, the turbo model (G20T). I would consider buying another G20, if standard transmission and/or turbo model. Unfortunately, Infinity is catering to the gas-guzzling habits of us Americans and no longer even makes a car with a 4-cylinder engine.