The new Dreamliner fleet LATAM operates on its longer sectors is excellent and the business class seats are huge. The configuration is 2-2-2 so the window seats either side don’t have direct aisle access, which could be a problem on an overnight flight. If you’re travelling alone I’d recommend taking one of the centre bank of seats so that you don’t feel hemmed in by someone you don’t know next to you, or get disturbed by them wanting to move around at night, if you have the seat in the flat bed position.
Amenities are basic - a small kit with L’Occitane products, plus a pillow and duvet. There are no mattress pads (the seat feels a bit hard when fully reclined) and if you’re very tall (over 185cm) you will have to curl up to sleep.
In sitting position, the in flight entertainment screens are a long way off, which was a bit of a struggle to see, and the storage options at your seat are limited.
Food on the flight was edible and requests were actioned fairly quickly. Priority boarding at Lima airport is a bit disorganised - passengers with special needs get boarded first but this doesn’t appear to be well policed.