Good ship, but doesn't adhear to the lore. The prometheus is an ESCORT, like the defiant, not a cruiser. It's actually much smaller than the soverign class, not bigger.
HOWEVER, very very very awesome multi-vector mode. I've used this ship in the Star Trek Online MMO before, and it's exceptionally fun to fly.
On an off hand note one of my friends recently picked up the T6 Version and got the T5 for the MVAM and he says its quite good i personally run either my Tholian Tarantula Dread or my Jupiter class Dread Carrier