I really liked the original Q.U.B.E. and wanted to like this one. It did not live up to the bar that the original set. Don't get me wrong Q.U.B.E. 2 has some decent puzzles. But there's too much walking and backtracking to get to each puzzle. Most of the puzzles are in separate rooms connected to a hub. You can tackle the puzzle rooms connected to the hub in any order. In theory I like this idea. In practice I hated it. The hubs made it feel like I was not progressing as quickly as I wanted. The game also separates some of the levels with way to much walking. Sometimes the game forces you to get on a really slow elevator to get into another room with more puzzles behind a door. Then when you enter that door you're forced to ride ANOTHER really slow moving elevator. And since everything is a hub, you now have to backtrack back through both slow elevators to get to the next room. It's unnecessary and completely un-fun. The linear sections of the game where they introduce a new mechanic in a series of puzzle gauntlets to teach you how to use that mechanic were great.

Also the story is pretty meh. Most of the time its out of the way and when it isn't its pretty bad.
QUBE 2 isn't bad. It has some decent puzzles, its the perfect length, and if you enjoy 3D puzzles games its definitely worth it on sale. But it only comes close to how good the original was.