It is absolutely worth it and is one of the CP stars that I have permanently slotted.
What Treasure Hunter does is upgrade the reward level by one. So a Simple chest will give you the rewards of an Intermediate chest, an Advanced chest will give you the rewards of a Master chest, etc.
Okay, but why is that useful? People in this thread mostly talk about item quality, but I think that is mostly irrelevant. Upgrading items to purple is pretty cheap and easy to do, and chest quality has absolutely zero effect on item quality for chests located in dungeons and trials since the item quality in those locations are pre-set and uniform.
What is far more useful is improvement in the chance of finding a set item in the chest. Normally, Simple chests have a small chance of containing a set item, Intermediate chests have a moderate chance, and Advanced chests are always guaranteed to contain a set item. And if you have Treasure Hunter slotted, then Simple chests will have a moderate chance of containing a set item (the earlier post saying that simple will always contain set items is incorrect), and Intermediate chests will always be guaranteed a set item. Master chests, if you have Treasure Hunter, can contain multiple set items.
So Treasure Hunter significantly increases the drop rate of set items (however, contrary to an earlier post, chests are always uncurated), and with the number of set items in the game quickly approaching the 10K mark, players will spend far, far more effort and time collecting set items than upgrading a piece of gear to purple, which is why the most impactful benefit of Treasure Hunter is the improved item set drop rate and the gear quality from overland chests is, by comparison, an irrelevant detail.
Finally, Treasure Hunter is particularly useful in Veteran dungeons, because chest quality in Veteran content is always Intermediate or higher (Simple chests will never spawn in Veteran content), which means that if Treasure Hunter is slotted, every single chest is guaranteed to contain a set item. Which is pretty darn useful for collecting those BoP dungeon sets...
BixenteN7Akantor wrote: »It basically upgrades the lot of the chests by 1 difficulty. Simple->Intermediate, Intermediate->Avanced,...
The Simple->Intermediate gives all Simple chests an overland gear piece so, yeah, much better.