I'm not even level 50 yet, but have already collected a full set of armor and jewelry that's at least i90 (and i100 in the case of one of the rings). And that's just from spending a couple evenings with a hunt party going after whichever A and S ranked mobs we could find. It's a lot of fun, and I'm glad the reward levels are high enough to get lots of people interested in doing it (since having so many fellow players is what helps make it so fun), but it does seem to sort of overshadow the rewards from pretty much everything else in the game.