Hello,
Here is a link to a review of the original Space Rangers by Kieron Gillen, formerly a member of Rock, Paper, Shotgun (although this review is on Eurogamer):
http://www.eurogamer.net/articles/r_spacerangers_pc Apparently most other places didn't bother reviewing it because it was a bit low-budget, but Kieron liked it a lot and his review should give you a good sense of it.
I can also say that it was by the same people who made King's Bounty: The Legend, which is also available here on GOG, and apparently these two titles share a quirky sense of humor, which I always like in games (I haven't actually gotten around to playing either game myself yet though).
EDIT: In the review Kieron notes that there's some confusion about the numberings of the games, suggesting that the one he reviewed is actually the second one, but was released world-wide as simply "Space Rangers". I am almost certain that it is the same game that is for sale here on GOG (the same screenshots show up), but I'm not sure whether all those who keep mentioning "Space Rangers 2" are actually thinking of THIS game. Anyone know the full story?