My Limited 1 pull:
That sure was worth 50 gems. Especially that Yulan that I already have max slotted from the free gacha. I'd be so angry if I was actually spending money on this.
This brings me up to eight 4-stars (and zero 5-star+) in three 50 gem premium draws, compared to twenty-one 4-stars from the free gacha. And I didn't get the Yulan skill up, so basically 50 gems for absolutely nothing.