For anyone that has not had a Poseidon, I will tell you that I feel it is an excellent piece of sapphire all around and is on par with the Seafarer II (and better than all other sister-brand, Borealis, pieces IMO) and better, in fact, because it is a bit smaller. In fairness, I can't speak to other Prometheus pieces because I own only 2 Poseidons. If I was in a position, I'd grab the blue/yellow and green pieces. The only shortcoming the Poseidon has is its long lugs. However, it really doesn't bother me and I'd chalk it up to the vintage look it is emulating.