The bargains, what fey want, and boons and things are okay, but Domains of Delight (here on dmsguild) does a much more thorough job of explaining it, complete with more examples. I also didn't really like the "hierarchy" of the Feywild and the "terms of contract" and whatnot. Fey aren't lawful evil devils; they're less concerned with legalities and terms and physical contracts, so they didn't feel right.

The supernatural charms are pretty neat. The magic items are so-so. The NPC examples don't really feel whimsical or chaotic enough to be interesting fey.

This supplement is cheap, so it's worth the money for the inspiration alone, but overall I think (like most 3rd-party homebrew) the custom items, elements, and NPCs lack some more daringly fantastical and wondrous elements, sticking a little too close to what's already been published and what can be created without too much effort.

Wonderful resource for all dealing with the Fey. This puts a loose frame work around those dealings to have enough for you to roll with but not so much where you are locked into a poor encounter. I am not running any adventures into the Fey Wild right now but when I do I am grabbing this.

I've already ran my players with their characters through the Feywild and it was a ton of fun. However, it was after reading this that I noticed all the great things, all the fun contracts I could have made! I'm definitely putting this to good use in the future by having PCs enter the Feywild again, getting them lost, making them lose memories, accept dubious bargains and fall to the fey entities' manipulations. Not that they do it in an evil way, it's just what the fey consider normal!