Mata-Yadh is a "Fledgeling Behemoth" a phrase which here means "Pretty damn powerful, but possibly beatable by a starting Circle if they prepare, co-ordinate, and at least all have offensive Excellencies". It's interesting, and I've just realised in the game I'm playing my Circle (of 5 Essence 2 Solars, including a Dawn and an Ebon Shadow Night, but no-one else particularly focused) killed a reskinned version of this (sans rider).

The Doppleganger is a pretty scary, at least insofar as it has the potential to keep up its ruse for at least a conversation with a Solar. They're pretty close to the generic idea people have of them, but this flavour is undead and has a vendetta. It has an Eclipse charm that lets you steal motes.

I'm mostly rating this 5/5 because of Mata-Yadh being a great example of how to make a threat for your Circle that they'll have to work smart and hard to deal with, and because I was pleasantly surprised by the Doppleganger; to be honest, I'm also a bit of a sucker for anything that I can just "yoink" and this includes the Eclipse Charm.

The wyld behemoth is pretty sweet and the doppleganger is an interesting enemy.

The two beasties provided in this booklet are simply not worth the money. The Ghost's dice pools are quite high for its purpose, and the Behemoth will probably destroy your average PC Circle of Solars. The Ghost is an easy fix; the Behemoth has interlocking mechanics that make fixing it a tear-down job.

While I'm all for tweaking material to suit a group's needs, these diverge significantly from the material and tone with the rest of the game, and I don't think it was worth the money. I can find plenty of great ideas on the internet for free and then pour hours into the mechanics.