No disrespect intended, but actually such one-liners are really useless. Could you tell us why you would say 'their support sucks'? Have you been a customer & encountered support lack of their product? Detalied & clear posts are always benefical to people in estimating & evaluating their opinion/decisions about products & services that being discussed.
Oh yeah, how many ppl do you think using them instead of other cms?? Just take a look at some other cms and do your own comparison, some may cost you hundred bucks, some are free but the modules are not, but because of their support, ppl just dont mind to spend, but subdreamer ?? give me a number to prove it.
+1 for Bitweaver. Second place going to Drupal. Third place: MODx CMS Joomla - sucks!!! hm... maybe not sucks, but this is the system non for serious projects, driven by noobs!