It's hard not to get depressed when you read all the "doom and gloom" posts. However, Disney is pretty good about minimalizing disruptions as much as possible. Yes there will be construction work going on at the Poly, but it will be during the day when most guests are in the parks. The construction areas will be walled off so you won't be walking in unsafe areas. The quiet pool will be available, and if the Volcano pool isn't Poly guests will be allowed to use the pool at the GF.
The monorail will be open during mornings, evenings and weekends. Yes, the 11:30-7 p.m. Weekday daytime closure is an inconvenience for getting to/from the MK, but the boat that runs to MK from the Poly is wonderful and more direct. Since the Epcot line is not affected by the closure, you can walk from Poly to the TTC and catch the Epcot monorail there.
All the rooms have been recently refurbished and are lovely. The beds are super comfy and the bathrooms now have dual sinks.
The three dining locations -- 'Ohana, Kona and Captain Cooks have delicious offerings (including "fill your own Dole Whip" and Tonga Toast!) Tambu Lounge has great atmosphere and yummy tropical drinks (Lapu Lapu, @
DisneyDebNJ 
).
The resort is so peaceful at night and the tiki torches give a romantic atmosphere.
Bottom line -- the Poly is a wonderful resort even with the construction and closures. If you expect to have a bad time before even getting there, you probably will. But if you focus on the positives, you may find yourself falling in love with this resort.
(And yes, I am one of the many haters of what DVC is doing to the Poly. I wish that the Poly would remain untouched. But sadly that is not an option. So I choose to stay optimistic. And I have a Poly vacation booked for June.)