I've been using mine for several years and really like it. To me, there's no down side. I also use an MIT Z - Isolator HC which is a nice match. Both have been flawless, reliable and very effective. They are the one constant(s) through any other changes in my system. Previously (several years ago) I had the API Power Wedge model 1 and then the model 116 mk2, both were big improvement over "bare wall" but the MIT's were/are better. Get them for $500-$600 or so and you're doing very well. (IMHO), good luck.
