Scott's is the same company that makes Miracle Grow, it's like a low end version of MG. I used Scott's Sta-Green once in the past, the green one, not the moisture max, and it was absolutely horrendous. The consistency was more like mulch than potting mix, I found all kinds of plastic and metal bits in it, and the drainage was non-existant. The buckets with Sta-Green weighed about 2-3x as much as the buckets with Miracle Grow or Pro-Mix after watering. They didn't get any water for a week in the middle of summer and the bottom of the pots were still pure sludge. A few plants died, some more got root rot, and the rest I had to take out and put them in something else to try to salvage them. I don't think MG is completely terrible, the consistency and drainage is pretty good, I don't like the time released fertilizers though, especially for younger plants. Pro-Mix is better imo, but you can get pretty decent results with MG. Glad you're getting good results with Sta-Green, but I will never touch that stuff again, not even if it's free!