Free you say? I love free, although I'm very skeptical about trying anything new. Generally I just stay with my Civ 4 games. I know those are fun
How has it been so far quality wise?
It seems well designed. It is easy to get into but shows potential to be as complex as you like. You start with one ship and you can just trade and get your bearing. You can max out at something like having a whole fleet armed and take on pirate(s)/planets and steal all their stuff or be a pirate yourself.
You can also optionally take on missions if you prefer a more role play style. It is very open ended and in the absence of anything else you can just capitalistically transport and trade goods.
Ships can be quite configurable too, I think especially as they get larger and you can covert space between cargo holds or equipment "holds" (ie. weapons and defence measures).