You could call this a CoD clone (close quarters MMS), but that wouldn't do it justice. Yes, the gameplay is quite similar on a basic level, but between the very deep customization options and the neat little gimmicks like Hardsuits and the Hyper Reality Visor (which is essentially a short-use, universal wall-hack. It's cooler than it sounds), set it apart. My main gripe is that the actual micro-transaction that this game runs on are quite overpriced ($4.00 for a single weapon attachment? Really?), but as someone who doesn't actually use micro-transactions, that's a moot point.
Overall, this would be about a 8.5/10 if I believed in numerical ratings. It's a fairly fun F2P game, but it has a few issues that hold it back.

Very simply, this is one of the best shooters I've ever played. It also has one of the highest learning curves of any game I've ever played. Subsequently, every kill, cap, body block, gen kill, and so on is extremely satisfying. This isn't CoD, and if you try to play it with that mindset you'll hate it. (And suck. Horribly.) This kind of fast-paced competitive FPS is a dying breed, and this is certainly worth your time.

It's a free, quirky little MMORPG dungeon crawler that you could play on a potato. You have no excuse.