The recommendation is based on the alpha stage gameplay.
I enjoy the conept of incorporating the gaming community into the actual creation of game content. This means lots of diversity. It also constantly improves the idea of a good "map": as one plays different maps from different users, his own taste for a "good" map diversifies and shifts.
What's even better is that, there are quality maps. Some maps you can tell the designer spent hours on perfecting. The map creation kit also handles very well-- easy to grasp and almost anyone can build a map. The creation kit is also powerful enough to allow users to create very different environments-- a very elegant blend of simplicity and power.
The game is easy to get into. Jump into a game, and click on the bad guys. Key bindings are laid out clearly. The gear is diversified, and your character changes appearance with each piece of equipment equipped. The loot system is balanced in terms of statistics, and it constantly poses questions like, "would you sacrifice LUCK(magic find and crit chance) for damage?"
Combat... feels a bit slippery. Sometimes it feels like youre walking on ice: as you take damage you slide around, and so do your enemies. Your special abilities are limited. You have only 4. Worse, you don't unlock all of them until higher levels. This makes lower level combat repetitive and at times, monotonous.
There are also certain balancing issues in the game. As you reach levels 10+, you begin to encounter enemies that can 1 shot you... even with gear deemed rare, extraordinary, and legendary. (Gear ranks from junk, common, rare, extraordinary, and legendary.)
The downside to incorporating the gaming community into content creation is that there will be inevitably faulty maps that are incompletable or maps that overreward you/ under reward you. While I understand the developer has taken steps to mitigate such problems, the issues still exist. I have encountered very hard challenges on maps marked as "easy".
Multiplayer is bare bones. You can join on players (though, I have NEVER seen more than 2-3 joinable games within the US at any given point in time). However, you can't trade, share, or give loot.
I say hold off on this one.See what else the developer has to offer. Right now, the game is still rough (of course, its in alpha), and still needs some tweaking. With the features it has right now, it just isn't worth purchasing for 15 bucks.