In case you're doing a decent amount of Flex Raiding (I have been, in addition to normal) then good news - this week, the Underhold, the third wing of the Siege of Orgrimmar, is now available via flex. Our friends at Wowhead have this roundup of the available loot options from new bosses Malkorok, Spoils of Pandaria and Thok the Bloodthirsty for you to look over and plan where to best use your Warforged Seals. My luck on weapon drops has been abysmal this tier, so I'm even considering that Britomart's Jagged Pike despite all that haste and mastery.
So far I've really liked Flex - it's completely replaced LFR for me, and I admit it speaks to that place inside me which used to run ICC 10 every week to gear up for ICC 25. Perhaps that's wrong of me to have that inner voice, but I do, and so I'm happy with Flex. How about yourselves? Done with it, tired of waiting for new wings, or really loving it so far?