I have a Brit Dessi and it is ok. The front guns have a very limited firing arch. The concentration of fire forward is fair, to the rest of the sides it is pretty poor. Manuverability is pretty good and armor is good.
I have it set up as a cap killer with a mortar to the front and to the back. The rest of the turrets are Basic ones so I can fire while charging the energy back for the mortar.I have one missile turret on the 360 degree point on top to stave off bombers.
I don't really use this ship for PVP much, it is mosty there to RP a Brit patrol. I have found that it works pretty good just because it can manuver pretty well and let you keep the front guns on the target by strafing.