Your sub experience: Easy or hard?

For those of us with subwoofers, I'm curious whether you thought integrating it was easy or difficult.  That's it.

Of course, lots of DBA people will chime in. No problem but please ask that everyone stay on topic.  If you want to discuss all the pro's and cons of DBA take it to a brand new thread.  Thank you.

The focus here is just to ask how many people had easy or difficult times and what you thought was the difference.