We loved the Premier Room's terrace, although they should change the way the door to outside works with the curtains (impossible to open doors with curtains closed).
Also, we specifically chose the Premier Room (with terrace) because Expedia had it listed as such, and an outdoor area was required for our trip needs. Luckily, i contacted the hotel directly before our stay to confirm that we had the terrace, and come to find out that there is only ONE Premier Room which has a terrace (and it needs to be booked directly through the hotel).
When we checked in, we were informed that normally to get the room with the terrace, one must pay an additional upgrade fee.. Luckily Honza waived the upgrade fee (thank you Honza).
Still not sure if its expedia or the hotel handling it this way, but be aware if you require a terrace (they seem to oversell the one room, so i would call them to confirm)!!!
Overall the stay was epic, the Buddha Bar Hotel and its staff is awesome, and we will always stay there when we goto Prague!!!