This is a must visit for me every time I'm in Montreal. The staff are professional and courteous. The walk in humidor is a slice of heaven. And the lounge is a tranquil, classic cigar smoking haven. Adorned with Cuban artwork and cigar paraphernalia.
The lounge is also licensed to sell drinks. They make fantastic mojitos and the espresso made with Cuban coffee always makes for a great pairing with any cigar you choose. And of course, there is the Cuban rum. :)
To use the lounge you must purchase from them, which isn't cheap, but blame Canadian taxes for that, not them. It is totally worth the price of admission. As one of the few places in Canada where you can enjoy a cigar indoors, year round, this is a treasure.