I thought it was well balanced, although I did not use a rye, per se, but a Canadian Blended (Rich & Rare) that came out of my late father's liquor cabinet, with a 1/tsp of simple syrup.
I love suze and montenegro together, and rye based recipes, but was a bit disappointed with this. The suze is a little over dominant (and I do like suze bitterness), pehaps the proportions need a tweak for my taste to uptne amaro and drop the suze