Well, I gave pole beans a go this year, and, I must say, they just keep growing and growing. They actually got all tangled-up with my cucumbers since some of them were planted too close.
I think I underestimated the height that the fence would have to be. I had a 2 foot tall chicken-wire fence that I planted them along and right now, they are all just clustered up, sprawling across the top of it
I think next year, if I don't have a trellis large enough, I'll go with bush beans as they really don't need support.
I'm still picking a lot of beans, though.