Tales from the Tiers is a DLC in it's purest form, truly it COULD have been free. Truly there's nothing bad about it besides the fact that I would only recommend it as a bundle or on sale. The content itself is more than fine.
Added encounters add variety to the world map, ways to interact with and flesh out your Fatebinder through RP and to flex some skills(Subterfuge, Lore, Athletics). I haven't had repeats on my playthroughs myself.
It does not require a new playthrough to be used, which is nice.
The items can be good for early game, especially for players who might struggle with the combat system, but aren't mind blowing or critical to harder runs.
Generic pro-tips for the interested:
-It'll flex Lore, Subterfuge, and Atheltics in random encounters