It's a pretty good game, a little short though, single player is good until you've discovered everything (this could take a while), same with multiplayer. The problem is that there isn't much variety in the game at all, not as much depth as a lot of people were hoping for. Some examples: all ships fly at the same speed, all missions are pretty much fly somewhere and destroy something, there is no dynamic commodities market, systems aren't randomly generated (would be nice for multiplayer servers), ...
BUT thankfully people are working on mods for this already and some look like they have a lot of promise, people are working on flying battlecruisers, changing ship speeds, creating new mission types, etc, etc...
Don't get me wrong though with the above, I was hooked on the game for a LONG time, if you've ever played Privateer or something similar, you'll know the "JUST one more mission and I'll stop" syndrome
Something to note, the game is all mouse controlled, so if you're expecting to fly with a joystick, well, you won't be But I have to admit, their interface is very easy to use, and you'll get used to it very quickly!
Hopefully an expansion pack will be released to add more variety, and of course they'll only make that expansion if people buy, soo....buy away