fleabitten just posted this on the reflex subreddit:
So there's been a bit of hype surrounding Reflex Early Access. Yes, it's hitting soon -- we've just got to wait for Valve to approve it.

You'll be able to grab yourself a copy a play immediately but before you do, you should be aware of what you're paying for.

When we say Early Access, we mean it. The game is playable but still completely unpolished and you won't see any huge difference between the Early Access build and what you've seen in the trailer/streams.

We don't have all the modes. The weapons are not final. The UI is ugly and basic. The editors don't support even half of the features we have planned for them. A lot of the sounds are pretty crappy. Most of the art is missing. We don't have matchmaking. We don't have bots.

In short, the game is going to be rough. Game development is a slow process, especially for a small, unfunded indie team. Reflex is not competition ready and won't be for a while yet. It's not ready to support a large scene.

For now, it's fun. It's playable. You can build maps. You can watch replays.
But it is a long way from finished.

You have been warned ;)