I really like this item. The AS can go up to 52% and the AD is 30. The AP can go up to 92. and the extra spell vamp and life steal is very useful when below 50%.

My favorite champ to build this on right now is Tryndamere. It's not a good early game item, becasue getting the stacks going isn't that easy, however, I build it after a PD, and Tri-Force. With that I build a BT and an IE.

The AP comes in handy right before the ultimate ends. The cool down on the stacks last 8 seconds. Tryn's ult last 5. His Q has a 1.5 AP ratio so you can get over 100 extra health with some stacks.

The below 50% AS on Tryndamere is easy to use while ulting.

The only problem I see with this item is that I am not buying a Ravenous Hydra, LW or Yomuu's.

I like this item on Poppy as well. The main thing I have found is that you need AS to get the stacks quickly, so this is a poor first and even second item on most champions.

The below 50% AS and lifesteal/spellvamp is good in conjunction with Poppy's passive.