I decided to grow these two because people argue that these are the best for pumpkin pies. Some prefer one over the other. Officially, it is the Blue Hubbard not the Baby Blue Hubbard but I didn't have room and the baby grows semi-bush.
I think one of the major downsides is that the winter is very unproductive. So far, it has been only able to sustain one pollinated fruit at a time. It keeps aborting the other females. I have been hand pollinated along with the bees. I thought it might just be me but then I read this link: http://gardeningafterfive.wordpress.com/2010/11/10/pumpkin-taste-off-reveals-best-choice-for-pie/
and the second comment at this post: http://forums.gardenweb.com/forums/load/rmgard/msg111124335147.html
I guess I won't be growing this one next year unless I get another plot or move.
The winter does a good job of flowering which is great. So far, I haven't been without a male when I needed to pollinate a female.
The BBH has been slow too. It has a nice fruit going now and it grows every day. It had the hardest time with a cold snap in June; it may just be that. It has since recovered and is a really healthy plant. I would recommend growing at least 2 plants because it hasn't always had a male flower when it had a female flower. It too keeps aborting females when it has a pollinated fruit growing. I would love to hear everyone's experience with either or both plants.