The downside to this is there can be long periods of just getting from A to B which although you can use 'turbo' engines to get there a bit quicker, it can drag the pace of the game down a bit.
The space combat is quite fun, and there looks to be a large amount of star systems to explore, upgrades to ships and general Elite-ing about available in the main game when it gets released.
Whilst it is difficult to review an early demo, and of course the main game could be very different, the demo itself is worth downloading if like space-em-ups and have a fancy to relive Level 9-style text adventuring.