I crashed quite a number of times but then when I stopped alt tabbing out I stopped crashing. For the most part.
Had a lot of bugs though. Sometimes ships completely stop moving or responding. Skills don't work. Etc. Fun though.
I kinda wish it was slower paced so I can zoom in and watch my ships duke it out. Too bad I spend all my time microing everything because the game's ship AI is borderline retarded and useless. I also wish I had more ships to use. These numbers are kinda pathetic. 3 ships does not an epic space armada make. If a real life admiral only had 3 ships to use he'd be a fucking laughingstock.
The campaign has been pretty entertaining so far. I'm at act 2. I've been mostly using a carrier cruiser, my starting light cruiser (that they make you put the fucking navigator on for some stupidass reason), and that frigate that has a macro turret and a torpedo launcher. Slaughtering everything I've come across with that setup. The carrier cruiser is awesome, especially when you pump stats into the ordinances. The starting light cruiser is also pretty tanky because of the forced shield stats. The frigate is great when you upgrade its macro turret to 9000 range. Actually becomes useful at that point since it basically becomes a sniper rifle.
I laughed a lot when I realized the pathetic Eldar don't have any defenses against lightning assaults. I learned this by accident during the story mission when you first run into them. One of their ships shot a torpedo barrage at my fleet while I approached so I used the micro warp jump to jump ahead (I don't really understand how the micro warp jump works. It seems there's so many places you're not allowed to warp to). However, when I did this I accidentally warped next to the Eldar cruiser. My cruiser then blasted it with a full frontal strike of melta torpedoes followed by it's skill-boosted double lightning strike and the boarding ordinance. The poor Eldar was on fire x4 and basically dead.
I also really, REALLY love ramming enemy ships. It's frigging hilarious. It's also hilarious when the orks ram your cruiser with their frigates and explode without doing anything to you.
So far really enjoying it. Definitely has problems though.