If you're looking for a print review then check out issue 58 of UHF magazine...www.uhfmag.com
in the reading room they have a partial review...you'll have to order the magazine for the whole review.
To sum up they liked the MG Head(the non DT version) quite a bit. The DT version is an improvement.
As an owner and still using the stock tubes, I have been extremely impressed...it's much better than solid state offerings in this price range like Creek and IMO is a step up from the amps like Grado. Indeed, it's been a very nice surprise.