I never used any other CMS than MAS but i gotta say that their support has always been top notch and swift! Also as a company they seem to take their shit seriously and they are about the only company that acted like professionals when we (smart scripts) needed some tech stuff implemented in our new product.
My MAS install is pretty old and has always been updated to latest versions, server moves were smooth as well. I will not stop recommending them when the question is dropped.
