Visited Montreal last month and had a nice experience. The Metro currently runs the newer MPM-10 Azur and the older MR-73. Almost all of its 68 stations have side platforms, even the terminals. The trains were frequent and reliable. On Friday they were running every 4-6 minutes, and on Saturday some 6-8 minutes. The system has 4 lines (Green, Orange, Yellow, and Blue), but are numbered 1,2,4, and 5 (3 was supposed to be a planned Red line that was never built, but that routing has some similarities to the under-construction REM). Of course, a big difference between NYC and Montreal is that the Metro uses rubber-tired trains, just like Paris. Overall, I was very impressed.
The REM Réseau Express Métropolitain under construction, on the Champlain bridge.