Not bad, most mobile plans in canada are around this much. Note that they mention after the 18 month period the discount changes, so the price probably hikes up a little after.
Now check see what speeds they offer the data on (LTE, 4G, 5G), some like Koodo have lower data speeds unless you buy an extra add-on for that. Some providers like Fizz have nice prices, but their speeds are terrible so it ends up not worth it imo.
I hope this plan includes unlimited calls and texting, and if you don't plan on going across the canadian-usa-mexico borders maybe they have a cheaper one without