Mike wrote an answer about Mountain Hardwear Helion 2 Tent 2-Person 3-Season on August 23, 2009
Yes this tent does have the bathtub floor. It is also very waterproof, I took this tent to Mt. Whitney and the first night we were there was a thunderstorm with alot of rain at trail camp and not a drop of water got inside! I highly recommend this tent its superlight and super strong!