I've used NLS for about a 2 years. The soil is pretty good. Cheaper if you buy the larger bags. Buying it by the 1lb bag comes out to like $125 for 5lbs but a 5lb bag goes for $45. This stuff is expensive. Though you don't need the whole 3.2oz/gallon that they recommend. 2.5oz/gallon is good enough for most unless you have a really hungry plant. It'll help you stretch that expensive soil. It's expensive because they literally put everything into the mix...... The only thing missing is the kitchen sink. Half the ingredients are redundant and just add to the price.
​​​​ When it comes to original vs autoflower, I prefer the original. The autoflower blend seems to be really spicy. I always got nitrogen toxicity and then later in bloom, calcium/magnesium deficiency. So if you use less then the recommended to avoid nitrogen toxicity, you run into more calcium and magnesium issues later. The original blend seems to be a bit more well rounded, but no matter which you choose, make sure you add some calcium, gypsum, oyster shell or at least some dolomite lime to address the calcium needs. You can foliar spray as well but I think you'll need some kind of calcium on the actual soil because it can get a bit acidic with all the microbe activity.
Overall it's a good super Soil. If you follow their grow guide (and you are extra calcium) you should get some really nice sticky buds. It makes great compost tea. It's LOADED with microbes and fungi.
But be warned this stuff stinks.... My good Lord does it stink BAD. That's the main reason I stopped using it. Also the price. I found out I get better results with a simple Coots Soil recipe and it doesn't stink like something died in my house.
I hope that helps some. If you have any other questions, don't hesitate to ask. My current grow is going to have 2x 7-gallon pots with Coco/perlite/castings with NLS Autoflower (because I have half a bag left and I don't want it to go bad. I spent good money on it). So if you're interested in seeing how it performs. I've also used it in past grows. Including the Blue Dream that I'm smoking on currently. .... Absolute 🔥🔥 The same Blue Dream Auto that I accidently topped. I got some nice even golf balls sized buds all over.
But after this time, I don't think I'll be buying more. That smell is so off putting even though it grows really nice flower.