Encounter in Space is fun, plain and simple.
I have to admit, the content unlock system as actually pretty neat. You have to earn points and save them up to purchase your unlockables. Some unlockables are more expensive then others so you'll have to save up to get the mor expensive ones. This really gives you something to work towards, even after you beat it.
Ecounters in Space is worth picking up. If you're a "Mobile Suit Gundam" fan, like me, you'll probably enjoy it even more.