The IS 300 is fun to drive, it handles really well. I have the 5 speed so it's quicker than the automatic (I drove both). The interior is sleek and I love the exterior. All around I have been very pleased with this car. I have had a couple isolated issues that fell under warranty, but I've talked to other owners who didn't have the same issues.
Escaine seats are really comfortable. I opted for those over the full leather.
It's a small vehicle. Not very much leg room. I'm about 5'10" and I have to have the seat far back which doesn't give the person in the back much room