I can actually partake in this thread. I'll probably do my report as I go along...
My family and I will be staying a PORS Sept 28th - Oct. 5...
I was able to access the Magic Band customization and FP+ reservations approximately 45 days from when we were scheduled to check in. However, I noticed that I had to do an online check-in in order to be able to access the system. I am not sure if this is necessary or if it was coincidental.
I customized the Magic Bands for my family and then started making FP+ reservations. Although I could pick attractions fairly easy, I didn't always get the times I wanted. However, once I made the reservations (close to the times I wanted) I exited the system and realized that I could go back in and adjust the times per attraction reservation. Bottom line, pick your attractions and then go back in a adjust your times to when you want.
A quick note on the Magic Bands...it appears as though customization can be changed but must be completed by a certain date (30 days prior to check-in date). Once you reach the 30 day mark customization is no longer allowed and a message states that the bands are being prepared for shipping.
My customization ended on the 28th, 2 days ago, and today I received an e-mail stating that the Magic Bands were on the way.
I came home and found these waiting for me:

Magic Band 1 on Flickr

Magic Band 2 on Flickr

Magic Band 3 on Flickr
The bands were very easy to take on and off. Another tid bit of information is that if you look at the picture of me wearing my band you will notice a grey strip that runs along the outside of the band. The grey strip is on every Magic Band and can be removed in order to make the band smaller for younger children. I have two DS, ages 4 and 6, and removed the strip in order to get a better fit. It was easy to do.
At this point I only have two minor disappointments;
1. I have been trying to make reservations for lunch at BOG because I read you could with FP+. However, whenever I try to access the system it states that FP+ is not available for the date I choose. I have tried for every day we are there just to see but still no luck. I am hoping as time gets closer they will update the system and I'll be able to make a reservation; and
2. I was hoping to utilize FP+ for Wishes and/or the parades but those options were never available. In reading other threads it appears as though they will only offer those reservations during busier times of the year. Maybe I'll get lucky and it will open up closer to time.
Aside from these very minor issues everything seems great and I am satisfied. I'll add more as it becomes available.