So far there are many issues that keep me from recommending anyone actually bother with this beta experience. The reality is, the servers aren't running at top marks, the game is full of great ideas and modes but lacking in strong mechanics and gameplay balance.
First and foremost, the beta allows you to try two game modes on two maps. The better of which is the airfield. It provides good cover and a rectangular shape that forces players into making quick moves.
But this is where some of the trouble with the game really lies. The features of Crysis online is the ability to become partially invisible using the cloaking mechanic and having the chance to use three very different weapon load outs. The server lag issues make the cloaking troublesome but using heavier weapons currently makes you so slow and clunky, its almost too frustrating to bother playing at all. On the other hand, this really is an early beta. The final game will likely feel faster, play much more accurately, and be more balanced.
Right now the targeting and hit recognition is awful, the lag causing you a lot of headaches, and there are often very long waits to find a match to join. Again, this is a beta after all. So it can't be said that this reflects the final game in any way. But we can make some guesses.
The graphics are as usual, very good. They will only get sharper and better refined as launch approaches. So I wouldn't expect any complaints in the visual department. Fans of the story line or campaign will not be disappointed.
The Cryengine 3 is packed with power, all of which is aimed at making this the best campaign ever in the series. Lighting effects are going to be even better than the last game, the console versions will be designed for them, which points to a better overall experience as well. So fans have a lot to look forward to.
Some of the gear, the bow for instance, provides for a lot of fun, though several other shooters already do this well. (Look for COD Black Ops 2's Crossbow, or FarCry 3's bow.)
The final game is scheduled for a February 19th launch, so its right around the corner. Let's hope they take the info from the open beta to sharpen the mulitplayer experience.
If they don't change anything from the beta to launch it won't be a great experience.
For now, unless you're a huge fan. Wait for the release of the final game. Rent it, beat it, and turn it back in. There just doesn't seem to be enough to offer online fans.
For official information
head over to http://www.crysis.com/us/crysis-3