Thought it might be worth noting my experiences of EZE as a first time EZE pax, but a long time airline manager.
CWL-NCL by J41. Timekeeping impeccable. Aircraft noticeably clean - made all the other aircraft I have flown on over the last ten years look grubby. Cabin crew very, very good, as was the service they provided. Fast track at NCL on my return trip appreciated, and again, impeccable timekeeping.
It is rare that I find absolutely nothing to fault on a return flight - but on this trip I make an exception. 10/10 Eastern. Will I be flying flybe on this route? No, never - I have seen the best and it works... bugger the price, this was hassle free and just great.