The Slayer was quite well done.
Very Good mix of abilities and the different mix of themes that could be carried out with each. Far more than just an assassin. Fionn McCool Lives!
And Bond!
Investigator is very interesting. We saw the Sherlock Holmes references immediately. There is also a Batman element that is quite present. Question though: Can you play someone other than a detective with the Investigator? Can you play an Instigator or The Doctor? Is it a good class for, say, Dr. Sebastion of the same Sherlock Holmes era? Sorry All, perhaps we didn't see it in the same perceptual viewpoints. We just all came up with Holmes...
Skald...Sorry All...this was a repackaged Bard. Inciting and Granting Rage/Rage Powers is cool and all. It's simply additional Bard abilities or alternate class features. You could do this Skald as part Ranger or Rogue and give class abilities to others as well. A Skald IS a Bard :)
The most interesting part of the Skald was the Spell Kenning. Very Neatly Done!
Well, That's the Thoughts :)