My two cents, as someone who flies LX on the 77W a few times a year, and *always* pays extra for the "privacy seat" (AKA "throne seat"):

Pros:
-Privacy seats in bulkhead rows are enviably private and have a larger footwell, from what I can tell.
-Food is decent compared to US/EU-based carriers
-Service has always been friendly and efficient, in my experience
-ZRH is a great low-drama airport for transfers

Cons:
-IFE sometimes has terrible options
-Hard product is inferior to some other airlines: seat narrow and hard, bedding perhaps not as plush