Buuuuuuuut Before you purchase this 'Thing' please try out the Patrol Escort you get for free or the mirror patrol escort which is more aesthetically pleasing for around 200k and draw your own conclusion.
Just because someone says something is good does not mean it's good, it means it's good for them. Find out whats good for you. People tell me that Crab, shrimp, and lobster is good. I don't like it so meh.
Lasonio, just because the Patrol Escort is more aesthetically pleasing (which is itself entirely your own personal opinion, I personally think the Steam Runner is more aesthetically pleasing than the Patrol Escort), does not automatically make it a better ship.
Additionally, the Free version of the Patrol Escort (the one you get with Dilithium) and the Mirror Advanced Escort (thats the one with the Patrol Escort Skin) are not what I have dubbed "Tier 6" ships. In otherwords they cannot compete with the Steamrunner, the Jem'hadar Attack Ship, the Mobius, the various Fleet Escorts or any other ship that has TEN Consoles. It just isn't possible for a ship with 9 or less consoles to compete with a ship with 10 consoles. Unless that ship with 9 consoles is the Chimera which is treated as if it has 10 consoles due to it's innate regenerative shield mode.
As for what ship is the most powerful escort all around. At the moment it is a toss up between the Breen Chel Gret Warship, the Jem'Hadar Attack Ship, the Jem'Hadar Heavy Escort Carrier, and the Mobius Temporal Destroyer. Only one of those 4 ships is the best escort. But it largely depends on build.
Personally I have had very good luck with the Fleet Patrol Escort. I prefer the universal ensign over the dedicated Tac ensign, gives some flexibility for survivability, that the Fleet Patrol offers over the other Fleet options. I run it with MACO MK XII and the Adapted Borg tech set and tend to do well in ESTFs.