Some folks have covered many of these points above as well, but here's what I learned. Going to re-state some of the obvious stuff as well in case helpful.
- $50 plus tax, per person, per day - 3 day minimum
- Only available 3/13/2018 and beyond (so I couldn't book this for my late Feb trip)
- It is bookable at the 90 day mark and must be done via DSS (eg, similar to how you would communicate with them now for dining reservations or FPs)
- You cannot make the extra FPs via MDE
- The extra FPs can be in any tier and any park
- The extra FP times can't overlap with other FPs
- Includes one reserved viewing area selection per night; choices are MK/HEA, Epcot/Illuminations, HS/Fantasmic!, AK/ROL
- You can't book it before the 90 day mark (although you can submit what you want to DSS before the 90 day mark and they'll book it for you on your 90 day when they get in that day)
- You select the extra FPs and nighttime viewing choices at the time of booking (although can be modified via DSS later)
- Your regular three FPs are still bookable at the normal 60 day mark - no change there
- The minimum three days do not need to be consecutive (I think)
- Reserved viewing locations:
- MK/HEA - Plaza Garden West (this is the fake grass/garden area in front of Casey's, the opposite garden from where they do the Plaza Garden dessert party)
- Epcot/Illuminations - Germany, on the water near the glass blowing cart
- HS/Fantasmic! - Near the dessert & VIP viewing experiance area
- AK/ROL - Enter via the FP area, close to the water in that general FP area
- There is a 1 day cancellation period
- If you book this and then cancel a CL (or otherwise eligible) reservation after booking or modify it to a non-eligible room, the package will be cancelled and you'll receive a refund
I will caveat that this is very new and they stressed it is a trial. Information and details are not really tested, and
with something with so many nuanced I suspect details may be fluid as we go along.
Let me know if you have any questions or if anything isn't clear. Hope it helps!