I generally try to use my points wisely. However, my family and I have vowed to stay at every DVC resort. So, although we have stayed at SSR a few times, we considered the Treehouse Villas a separate entity. Last year, my family of 4 stayed at the Treehouse Villas for 4 nights. We normally do not get a villa larger than a 1 bedroom so this was a treat for us. The only larger villa that the Treehouse that we have stayed in is a Grand Villa in AKV.
Although we've used more points in our vacations than the TreeHouse Villa stay, I would consider it a splurge since we would not normally book that size villa. So, I don't consider our 14 night stay in Aulani a splurge since we booked a villa that was appropriate for my family of 4.
Was it worth it? Yes, since we can scratch that off our list, but I wouldn't book it again unless we had more than 4 people.
We've stayed at all except for the Poly Bungalows. I don't think I would splurge on that until they fix the noise issue we encounter on our stay at the Poly. Also, I would definitely want more than 4 people to stay there. But it would be wonderful, I'm sure!!