The new Sony Nav-u GPS is just hitting the stores now and there’s a review that has popped up indicating that it’s not a bad little GPS. The nav-u features a 3.5-inch (diagonal) touch screen with a special coating to make it both glare- and fingerprint-resistant. It has a built-in light sensor to adjust the screen automatically for optimal viewing in any lighting condition and includes both a day and night mode. Many but not all GPS units feature this, and I think that it’s a big plus when they do. It’s a simple thing, but it makes a difference.