I have one, after longtime testing, and it's a very good tool for 2 out of 3 masters or mixes I do. I also purchased Jakob's Gyraf Gyratec X Varimu and that one get's used about the same amount of time too. Both are varimu, both give each their own distinct colorvariations. Check out Jakob's box too, if the pricetag of the Moonley scares you, you will not be disappointed with the Gyratec! If you like a tight lo-end the Gyratec might even better suited to your needs then the Moonley.
I was lucky to have both together in my studio for about 10 productions of testing/comparison (because there's a good moonley distributor close to me, and Denmark was still within reasonable shippingcost distance).
Call Jakob, he one of the nicest people I've met in the pro-audio world since I started back in 1987.