Never tried one of these models, but by and large, uncle Matz's high end production from the late 70s / early 80s is just great wrt/ wood quality, design and workmanship. Rather on the heavy side as Philly Q mentions, but well, a non-chambered LP is not really lightweight neither - incredible sustain comes with a price....
wrt/ mojo, well, it's the usual lottery whatever the brand, country, year and whatnot - some specimens are just magic, some are ok, some are lemons - but Mij, and specially Mij from this period, are known for their very good average quality (IOW : possibly less exceptional specimens, but definitly very few lemons). I have to admit I dislike the Aria Pro headstock shape to the point I couldn't buy one, but that's mostly me being snob :mrgreen: