THE SELL: A camcorder as small and simple to use as your cell phone. THE TEST: The 4.4-ounce W300 is compact and easy to grip, so it’s handy underwater. Plus, its fast f/2.2 lens shoots stills and video well in dim light. But onboard image stabilization could’ve been less wobbly and the menu functions less cumbersome. THE VERDICT: The quality won’t live up to your 50-inch flatscreen, but the W300 easily beats out a smartphone.