I haven't grown one either, but I hear they
are something that will grow unbelievable fast,
and will need eventually some kind of pruning if
you don't want it sooooo big..
And the birds are attracted to this vine and eat the berries, and either when they carry the
seed away or poop it out later, the vine then starts
growing alllllllllllllllll over the place and can become a nuisance in areas' that aren't mowed
and will cover
trees...
That's about the extent of what I'd heard on them.
A Canadian Gardener, who had her own show on TV, Kathy Reinwald, used to grow them, and she said she love them, but that they can get out of hand.