Absolutely superb! Just finished watching season 3 on Amazon prime. Back in the day I used to watch Babylon-5 faithfully. It took patience over 5 series of 20+ episodes.. and was an epic...Then came the rebooted Battlestar Galactica.. and this one top sit all..in just 3 series with 10-13 episodes each. Music is atmospheric..the different groups (only 3..thank Gods..) are all unique and believable.. Something about the way the sfx and cinematography is done in Expanse makes space travel more believable, lonely and scary in an `unknown' way.. more believable than B5 or BSG. Well worth it the ride. I could say more but this is the raw feedback..after just finishing it just 5 minutes ago!