It's nowhere near as awful as the Mark Millar and Grant Morrison stuff, but it's mediocre at best by the general standard of the Judge Dredd stories. (Even Ennis himself is on the record as considering his early 2000AD writing to be pretty crap.) I get the impression he was too much of a fanboy of the character to really write him very well; he shied away from being truly critical of Dredd and the Judge system, but at the same time amped up the "cool" flashy ultra-violence, so the end result was that Dredd was treating perps much more nastily and sadistically but the comics were less critical of his actions than they had been before. So there are parts of his run that really misjudge the tone and leave a bad taste.

Much of his run on the title's just sort of forgettable and a bit flat, but I can't think of anything that really stands out as great to balance out the bad stuff.