Excellent hard product and service in the air. Terrific lounge in Doha (Spend the money for the QSuite biz class upgrade if you can--it's spectacular!)
Terrible, terrible service from reservations. I spent hours on hold, many times from within the US, never reached a soul. Finally made contact on social media, got helped finally --needed more clearly-printed itinerary for Thai COE application.
Once in thailand, I tried to reschedule my return trip to the US. Never got anybody from within Thailand, social media referred me to a phone number in Doha. Hours of hold time, no answer.
Too bad, as I was going to abandon EVA and Cathay Pacific for Qatar, but now I wouldn't trust Qatar to walk my dog. And as I am now I a no-show on my return flight, the ticket and money are likely lost forever.
I fly CNX-SFO biz cloass at least once a year.
Both EVA and Cathay Pacific service CNX. Qatar does not.
Both airlines use the same fully-flat Zodiac seat.
Cathay has far superior lounges in Hong Kong. VERY nice. But wants $100/year to join their Marco Polo FF program. I don't think so. Their Asia Miles program is free, but you cannot earn any status. Join a OneWorld partner airline's program.
EVA has better onboard service and amenities (as EVA has no first class, their Royal Laurel class is essentially first class without the caviar.) EVA Lounge in Taipei is a disappointment. Go to the Singapore Air Krisflyers Lounge, it's marginally better. EVA's Star Alliance FF program is free, but stingy. Join Asiana's instead---use that number when flying EVA.