A very interesting and fun puzzle game that reminds a lot of minesweeper with a hexagonal grid (and probably a few other logic-based games). There are more rules, meaning that there is potential for much harder puzzles than minesweeper can offer, but since there are no randomly generated levels, the amount of time you'll spend on this game is minimal. Said potential is not reached, so the game is never really challenging, which does nothing to increase the length. (I had no problems completing all the puzzles in around 1.6 hours, so you could easily play through it in one sitting.) Still, there is one huge advantage: guessing is never required. Guessing is the one thing I really hate in minesweeper - of which I am a big fan, regardless - and to play a similar game without it simply feels wonderful.
I find that the sounds fit the game nicely; they feel calm and soothing and play short melodies as you click the tiles. This, along with the focus on number of errors rather than time spent (I'm looking at you, minesweeper clock), makes the game feel very relaxing, despite it being a puzzler.
+ No guessing
+ Nice, relaxing sounds
- Too short
- Too easy
- No randomly generated levels
If you like minesweeper (and/or similar games) this game is definitely worth the purchase. If not, I'd recommend you to try it anyway, since the game is quite cheap. For those who fancy something more difficult (and thus longer), Hexcells Plus and Hexcells Infinite increase the difficulty by several notches, fixing the first two cons mentioned above. (As you might also guess, the last one also has randomly generated levels, although they are significantly easier than the rest of the game.) In that case, this one might serve as a short introduction to the concept.