To those with Series 3; what's the verdict?

Probably way too early but honestly I'm just really excited! I missed the deadline for backing so I'll be grabbing retail pledges, yet I'm excited to hear some of the tea on the FFs for people who have their pledge now.

To me Killer From Tomorrow looked like it'd be the hardest (up with Inkan on Groves), Marrek Murders looks really different but fun, Hell to Pay seemed really awesome with the shifting map but I wasn't so sure about the Tremors and Stranger Things boxes.

Are these accurate assumptions? Any particularly awesome mechanic or killer you enjoy? I'm going to buy every box, I just want to see what people think and what stands out as fresh and/or really fun!