Summary: Love the game, amazing environment ripe and begging for a single player campaign. The lack of SP, and the absence of actual up/down travel (a'la Homeworld) is why it's only getting 4 stars from me.
Summary: I just picked up a copy of Sins of a Solar Empire and it's GREAT! It's everything I've been missing from Civ V. You can change the scale from either one solar system or an entire GALAXY, and from my understanding it's completely modable! I'm currently looking for Mods. I read that there's a Star Wars mod and this game would be GREAT as Star Wars, heck the engine/system they developed would be GREAT for Starcraft as well! And that's something that Starcraft lacks!
Summary: I've been trying out multiple RTS games, such as Red Alert, War Craft, Age of Empire, Star Craft, Command&Conquer series, Supreme Commander, etc... This game in particular is considerably complicated and takes time getting comfortable with it, and it is almost the same as the traditional RTS games (gathering resources and such).
Summary: I have extracted untold hours of gameplay from this title, and it really is a great game and a bargain compared to some of the junk you get with console games at $60 a pop (and you play for a week). Let me say I am not a big RTS fan, because you loose the element of strategy quite often in these games, but this game is head and shoulders above most RTS titles.
Summary: This was worth my 15 dollars. It's fun, innovative, and gives you the feeling of god after you nuked that planet. It's a huge scale RTS/4x a lot like civlization, Empire at War, Homeworld, etc, but it's kept very simple with the empire tree. Sure it's a bit boring building up your fleet, tech trees, and such, but when you do get that kick ass fleet and burn the enemy, it makes it worth the wait. However, it's a bit iffy.
Summary: Pros: Creatively designed game, cool capital ships, music is ok, programming is excellent; runs smoothly on older computers, no DRM when playing solo or lan, intro movies/logos go away when you click, well designed in-game UI, nice custom map maker, gameplay can be balanced between war and economy, open to mods. Cons: No tradition rock/paper/scissors: few types of ships.