Robert G.
Yelp
I'm going to go with 4 stars. It's great, but it can't compete one on one with the grandeur of Toronto's CN Tower. The unique feature about the Inclined Tower at the Olympic Stadium of '76 is that it is the tallest free standing and most inclined concrete structure in the world. And that sort of feat, in the 70s, was most likely to make for some severe budget overruns ... and it reportedly did.
Set on the grounds of the Olympic Stadium and adjacent structures such as the aquatic center and an exhibit of different bio-systems with representative animal life, the site is captivating for the extensive sculpting of these buildings and for the stark eery feeling of these shapes set against these vast open concrete plazas around the Olympic complex. They are impressive, though they are starting to look dated and there is epoxy that should be applied here and there. I'm sure the facility management team has their hands full. The Expos used to play in the stadium below the Inclined Tower and cables from the tower hold up the stadium's roof cover.
I really recommend going up on the Inclined Tower to its observatory if you haven't been. The Metro exits are Viau or Pie IX. One goes to the rear of the incline and will see a 2-story elevator that makes the sloped ascent. The height is about 60 stories. The price is ok and AAA/CAA helps a little. Now, compared to the CN Tower, the perimeter up top for viewing the city is slightly constrained, though it has a good angle and a good view. From the tower, you can see Centre-Ville, Sherbrooke St. connecting the center to the Olympic complex, the South Shore, Ile Ste-Helene in the middle of the river, all the major bridges including the Jacques Cartier, the hill of Parc Mont-Royal, and more. It really gives one an appreciation for Montreal's spectacular island setting.