Puck set's cool and all, with all the mastery gems and whatnot, but it's definitely not what I'd spend all that money for. All in all, that particular chest is definitely overpriced, and the sets themselves will drop in price pretty soon anyway (as they already are starting to drop).
The problem for me is with the two new chests. The pre-TI4 chests, also appearing in pairs, priced the same, contained much more interesting sets. But the ones now are... just a no-no. The Dark Seer one looks pretty cool, same with Batrider, the Rubick one is kinda overdone but I still like it. Which I can't say about the other sets. The Puck set is barely noticable, Furion's is so minimalistic I don't know why they even bothered adding it (especially after what the last set for Furion looked like, this one is just nowhere near), the rest are all purely uninteresting.