Packed tight and smart, this trim 1,831-cubic-inch carry-on had just enough real estate for a weeklong jaunt in Trinidad. While I was scouting hotels in Port-of-Spain, the Wapack's supersmooth polyurethane wheels and telescoping, ice-pick-style aluminum handle made it easy to weave through chaotic crowds without whacking anyone. In backpack mode, the padded zip back panel wrapped down and around the wheels to protect my rear. And for sightseeing around town, the detachable, 1,220-cubic-inch daypack has twin water-bottle sleeves, an internal iPod pocket/port, and cushioned, adjustable shoulder straps. timberland.comBonus: Suitcase-style handles on both sides.Bummer: The Velcro strap that secures the daypack is flimsy. Buckle, please.