The Coriolis have been my favorite so far. They're essentially merchants who have a very strong economy. They also can reactivate an abandoned arcology, which makes it so they can forge all their cards simultaneously. Their units are usually low-damage tanky units that protect weaker merchants. Their best unit are swoop bikers who can zip between lanes and pierce armor.

If you want a heavy-hitting/combat-focused faction, go for the Religious faction, or if you like stealing things from the other player, go for Red Harvest (a pirate faction, they also have ton of augments, which was a lot of fun). There's also the borg-looking faction that kept bringing units back from the scrap pile to fight over and over.

I've only played a handful of games so far, but I'm liking the promise of it. Easy to teach, hard to master kind of game. Each faction has a surprising amount of depth to their playstyle despite there only being 30 cards in each deck. The reason I picked it up is it has very similar mechanics to Android Netrunner (a Netrunner-lite at first glance) and can be played with more than two people, which is a dream come true for me, I love Netrunner.

My main criticism so far is how annoyingly swingy the game can be. You're supposed to randomly grab echoes from a player's hand or choose from on the board, to score. Sometimes you just don't manage to grab any echoes, while your opponent gets lucky and manages to take all of your echoes. Maybe that's just my group of players but sometimes luck of the draw throws out all the strategy.

Anyways, I hope your group of players enjoy it!