you definitely shouldn't need supports for marvin.

A fan on the print really helps - not sure how easy that would be on a dreamer, but I'd assume the the standard ducting setup we use on the creators should work. It's the same extruders on the dreamer isn't it ?

I assume that it is a single extruder...also can any brand of ABS spools fit in there, or do you have to use their own ABS spools?

Does this have a heated build plate?
dreamer is dual extruder with heated bed. You really need to read all of the thread :-)

It's essentially an enclosed creator - but with it's own firmware. Not sure if that makes it more compatible with 3rd party software like cura and slic3r - or less.