Firstly, thank you for sharing the link to the XDA forums. I like to live on the edge a little so I went ahead and rolled with Option 3 to get 6.0.1 on my Active. I followed the instructions to a T, but was getting an error from ADB: "null device not found" or something like that. Make sure you let Windows search for the latest drivers for the device.
After getting ADB to connect, the update ran for about 35 minutes and booyah! Marshmallow 6.0.1. Even if this is a leaked unofficial build, it is 1000 times better than my experience with 5.1.1.
Here are just a few things I like:
- quick and snappy transitions between menus and apps
- Already seeing improved battery life
- My Places is a great widget that is based on my location
- Improved drop down notification and settings
- Samsung Good Lock customizes the lock screen
- Wi-Fi Calling is enabled
- Recent Apps management is improved
- System keyboard looks great
- Camera settings are more accessible
That's all I can think of now. I don't know why it's taking AT&T so long to get this out, but when it arrives, I'm sure you all will be very very pleased.