Very creative, lots of potential here. Think Firefly with a crew of one.
I was 99% sold on the beta as is, but then I looked ahead at what the devs are planning by the 1.0 release. WOW. http://celsiusgs.com/drifter/wiki/Development_Roadmap
I will admit that at the moment the game feels like too little variety/content spread over WAY too much universe. Reading the roadmap posted above should remove any doubt though, this game will only get better. Factions, NPCs, a reputation system, random events, special missions, crafting, the list goes on.
So far, the biggest 'con' that I can see is that the UI is a mess. In a trading game, it cannot be a mess...it must be entirely streamlined. At this stage it tears you out of immersion as you question which tab lets you access your ship, after you bought items, that have to be placed ON your ship, and then ON the respective system, and then 10 clicks later you can leave the station with your new loadout. Half the time you forget which star system you are in. Also the radar and other readouts during flight take up half the screen, which is a pity cuz this game is so darn beautiful already. BUT...this is a beta. No worries.
The biggest 'pro' is, well, everything else. The music and sound effects are spot on, dogfighting music especially. The scope is immense, and from the title screen you see just how small you are. The ships look cool, the weapons look and sound fierce, and you have enough methods of going fast that the space isn't TOO overwhelming.
Good beta, GREAT potential. Can't wait for 1.0!