The montreal2 server has been solid for me for a very long time.
I just moved all my shit to montreal2. Total PITA.
If I have to move again, I'll be moving to another provider sorry to say. I've been a strong advocate for voip.ms for quite a while. They need to pony up now and earn it.
I've been with Montreal2 since shortly after I started using Voip.ms in 2011 because the Toronto connection even then was crap (and I live in Mississauga, literally a stone's throw from Toronto and not all that far from the Carat office in Hamilton)