Awesome little system. Very light and portable. The column is three pieces and, in fact, only the top section has speakers - the other two are spacers - so you can remove one or both of the spacers if you're in a low ceiling-ed place.
You can either feed it a line in from your mixer, or it does have inputs for mic and instrument if you want to go directly.
* it doesn't have a line out so you can't chain them
* the built in mic input doesn't have any effects
The cons are pretty minor. For a small space it's got plenty power by itself and I go through a small mixer anyway so the lack of reverb doesn't matter to me.