Now the bad. There was a lot to keep track of...we both forgot what our objectives did entirely...just now I'm remembering mine was supposed to explode. Then there was a random river, warlord traits, damage, psykers...you have to take notes just to keep half of it straight. I'm not a fan of the new wound allocation. It's better then the old shenanigans of 5th, but there were a few where it was just annoying. He rolled LoS for his champion on all the shots...1 stayed on him and he failed that armor save, then he had to roll each die until the meltagunner died as he was next closest and once he died he could finally scoop up the rest and roll together as there were nothing but bolters...and another meltagunner, but there were less remaining wounds then models between him so I couldn't get there. I'll probably get used to it and I do like that I can flank his unit, but right now it seems tedious. The new rules also ended up keeping one squad's champion alive when I inflicted enough wounds to wipe the squad, but he made all his LoS rolls so he survived alone.
Finally, this was also the first time I ran my Necrons since...2008? I played them a few times in 5th, got phased in 2 turns and went "see you when the new book comes out". Well, I was impressed. The Monolith, while not quite as unkillable as before is still awesome and I put a repair spider behind it so it was back to being practically immortal. The Destroyer Lord's lack of an invulnerable save wasn't as bad as I'd expected. Only once did I miss it when he took a hit from a psychic power that ignored his 2+ save. He had fun fighting demon princes. The foot list worked well...I deep-struck the monolith, which was gutsy, but let me pull troops through the portal. Preferred enemy came in handy a few times on the shooty destroyers, even getting a hit from a Heavy Destroyer. The Scarabs did their job well, devouring a predator and the Defiler. Whip coils were useful on the Wraiths. Mindshackle scarabs weren't too useful against a leadership 10 army, but I can see them being better against other armies. All in all, I'm happy my undead robots are back.
I really think this rulebook has rejuvinated my interest in 40k. The last year has ensured that fantasy will be a bigger part of my very limited gaming time, but I won't be putting the grim dark future aside after this.