My number one tip is to note that this place is cash or Canadian debit only!! If you forget once you arrive there is an ATM at the end of the block to grab cash.
Overall I had a great experience at the St-Viateur Bagel and Cafe! I ordered a coffee and smoked salmon and cream cheese on a "full dressed" (everything) bagel and my friend ordered ham and Swiss on a plain bagel and an apple juice. At first the cafe looks really expensive because their sandwich options are all $10-12, but then if you read further the menu notes that they all come with either soup or a salad. There are multiple salad options to choose from but only one soup. If you don't want a large meal you can forgo the soup or salad and get just the sandwich for $3 less.
I opted to just build my own sandwich and I was impressed! The bagel was perfectly toasted and came with a heaping portion of salmon and cream cheese and a side of cantaloupe. My friend did the pressed ham and cheese and she loved it! It came warm and was almost like a bagel panini. She also really enjoyed the apple juice!
I would recommend this location over others since this has the option for patrons to sit down. Either way, a St. Viateur bagel is a MUST when traveling to Montreal!