Just to be awkward I did vote yes in the poll but I don't always use them. For a small function room I only use the tops on stands. It's only at the larger gigs that I feel the bass bins are needed to reinforce the sound and give a more bassier feel to it.
Maybe the poll choice could have been expanded to include 'sometimes, maybe, don't know, what's a bass bin?' (sorry I'm in a funny (that's funny peculiar rather than funny ha ha) mood today)
PaulS