yea the ds lite has better screens and looks better and the dsi adds many features (and so on with the 3ds family) but the main reason i like the ds phat is because it fells SO GOOD in the hands (also gba slot dosent stick out)yeah and i kinda want one again but after thinking about the cost vs what im actually receiving, i usually decline to buy. they are just so terrible compared to later gen DS systems.
i owned about 4 of them over the years, the blue model being my favorite and one i played the most.