I am currently working with Comersus - not by choice - but because the customer bought it and wants to use it - convinced it is superb. The instructions are quite cryptic when you are trying to set it up and when you go to the forums for help - the help is minimal. Only giving you the bare minimum answer that doesn't really answer a question but leaves you wondering if you are missing something. I wouldn't recommend it, I don't have any other suggestions - but I hope you don't go with Comersus.
Side note: That is the reason I am here on these forums today - trying to find assistance that I am not getting on the Comersus Forums.
Good luck in getting something that works for you!