Quality of Mongoose stuff is not only variable, it is often variable within a single book, within and across categories. Consider the MRQ II rulebook itself.
The rules content is pretty spiffy, and apparently they did a very nice job of revising MRQ I, while keeping the original intent. The things that needed a major overhaul got one. The things that needed tweaking got tweaked, but not overhauled. And some things got left alone. You don't always get that kind of discernment in a major revision. That is not to say it is perfect, but it is a major improvement on the first try, while keeping the same design intent.
Organization? All over the place. Sometimes it is very nice. Sometimes things you need are nowhere to be found where anyone would expect. You almost have to absorb the whole thing, like a half-amateur RPG from the late '70s, early '80s to know where to find things. It isn't awful, but half amateur/half professional isn't far off the mark.
Presentation? Pretty basic, both in layout and art choices. I usually don't even care, but there were several places where I would have preferred some time and budget spent on a few tables being easy to read over an uninspiring and poor piece of art.
Edit: That came out harsher than I meant it. Within the limits of the resources Mongoose had to bring to bear on MRQ II, it is clear that they had a bias towards having useful and good rules that met the design, not presentation and editing. I'm fine with that bias, especially since they did largely do work to match the design intent. So I say this to point out that the game is better than it might first appear to some.