I've booked with several different Montreal agencies over the past year and a-half as I've visited this beautiful and charming bi-cultural city a number of times, and I've posted reviews for Montreal SPs. Here are my positive comments concerning the agencies (my preference is to simply remain silent when I have negative experiences).
I've had good luck with Matt at Velvet Love. It's a small agency with a limited roster on a day-to-day basis. Customer Service is excellent, prompt, and attentive.
I've had good luck with Joe at Sensations. It's a medium size agency, so there's usually a few gals on the daily roster. Customer Service is excellent, prompt, and attentive.
I've had good luck with Ben at Luxury. It's also a medium size agency, and the customer service is also excellent, prompt, and attentive.
I've had mostly good luck with VOG. It's a large outcall agency by Montreal standards, but there have only been a few mix-ups (such as not providing the SP with my hotel room number, or sending the SP 30 minutes early), but overall I'm very pleased with the customer service and the selection of SPs. They deal with numerous clients, locations, and transportation issues on a daily basis, and it's only fair to expect an occasional mix-up. I stay in a South Shore hotel and they add a $20. transportation fee which I think is very reasonable.
I've had more good luck than bad luck with XO. They do mostly incalls at units near the downtown area, but I've been privileged to enjoy outcalls to my South Shore hotel for a $40-$50 transportation fee. They are also a large agency by Montreal standards. They divide their daily roster into a day shift and a night shift, and there is usually 5, 6, or even 7 SPs on each shift. XO has a reputation for the most attractive and sophisticated SPs of the Montreal agencies. Sometimes, these attractive women can develop prima donna attitudes which results in cancellations a few hours before the booking, or on one occasion, at the time of the booking itself. They just weren't "feeling well".
I hope this helps other Merb subscribers.