I tried it - once - when it, the alpha ? beta ? came out, and was underwhelmed by its state. I just checked their forums, and activity has come to a halt around the 1st of March. Same with their news section.
To be fair, here's a recent post from their Facebook
Rekoil The Game Dan Jones Rekoil is very much alive. We had a great PAX East and got a lot of player feedback from that show that we are working on. You should be seeing more and more once we complete the next stage of development. Thanks!
May 11 at 9:36pm
and from Twitter
Rekoil The Game ‏@RekoilTheGame 24 May
@m0dded thank you for hanging in there with us. We should have some big news soon. Have a great weekend.
Looks like they intend to make a splash at E3 in June