Row 53 in J on the upper deck of a BA A380 is still one of the best seats in the sky. Direct Aisle access and a magnificent view of the engines.

Likewise toilets at the front of the upper deck are cavernous and comfortable.

As for APU issues have had them on a 744 on a 30 degree day. Not fun for 30 minutes but also not the end of the world.

As for F I'm hoping to UUA for an LHR-BOS flight in September just to have done it and the CCR. Albeit will mean giving up 53K.