Excellent. I have grown Polaris for the past two seasons. It is far and away the best butternut variety I have grown. My wife and I harvested at least two dozen mature squash from the planting in our garden plus some "wild-sown" plants in a waste area of our back pasture. In addition to its productivity, Polaris is a great winter keeper. We are still (mid-March) using unspoiled squash from last fall's harvest -- and we don't have a root cellar!
Good butternut type, but not outstanding. These were nice size and very productive. Amazingly, we still have 4 from 2019 and it is now June 2020. I must have hardened them perfectly. The flavor did improve with time (or as winter drug on, garden grown winter squash became much more a treat). Just had a couple this week and they are still good. Starting to dry out a bit, but wow - what a keeper. The only ding on these are that they are not outstanding on flavor. Still will plant them again just to have squash in spring!
I grow this variety every year for flavor, texture, and reliability. I usually get 12-15 squash from a three-plant hill. Today I picked 38 good squash, and there are stil 8-10 not quite ripe., from the usual hill. They obviously flourished in the high rainfall summer we've had this year.
I can only grow moschata squash, due to squash vine borers, and this is the best one I have grown. I get 7 or 8 large -5 to 9 lbs - squash per plant, and they last long - I still have some of last years out there now, with this years ready to pick. Also, this year was very wet, but they did not show a sign of mildew - always well disease resistant.