Spirit training is fast paced and relentless. You need to show up knowing flows (CA & FO), the main profiles and callouts, and all the memorization - COLD. Like sit in front of a paper tiger and do flows with your eyes closed. Bang out limitations & memory items before the question is finished - not be searching for them in your mind.
If you are this prepared, then training will be chill and in the evening you can sit by the pool, drink beer, and relax and breeze through it. I did, and it was only my 2nd type - and I breezed through with no stress. Those who show up expecting to learn during training don't make it.
You only get 5 sims before your type ride - from both seats. My regional was up to 13 sims and still had a 20% washout. at NK, not so much. There is not much time off between things.
All that said, the training is top notch. The Sim & FTD instructors are fellow pilots, and are top notch. No one is out to "get you". They want you to succeed - if YOU ARE PREPARED.