I did this instance on the PTR and I must say that the first time around, it's the best ****ing 5 man i've ever done. Obviously it will get tiring, boring, repetitive, and irritating, but it has the best loot and the first time you ever do the quest (there's a quest that gets you one crimson spinel of your choice and automatic heroic attunement to MgT), the miniature storyline with Kalecgos is very enticing, but other than that, the Kael fight is really fun.