For your convenience, I've input the mileage zones and redemption requirements for economy and business class for each program below. (uponarriving.com)
Because Arrival Plus miles are worth the same amount for domestic and international flights in economy and business class, you'll always get the same value no matter how you use your miles. (rewardexpert.com)
Every premium economy and business class seat is different and you don't want to miss out when there are good features that can be used! (theboutiqueadventurer.com)