I bought some less expensive potting soil mix this year and regret it. It might be OK for established plants, but it was not a good choice for seed starting. Too many big chucks of woody stuff in the potting soil mix I bought.
I think last year I used Miracle-Gro potting mix and really liked it. Probably should have bought that again for this year.

Lesson learned: It's hard to learn from your lessons if you don't write down what you did! I should have documented what potting soil or seed starting mix I used last year and how well it worked. I did not. Now, I'm only guessing at what I used last year. Oh well, I can write down the potting soil I used this year and that I did not like it.
Nor have I. I just have seen a number of YouTube videos on the subject and it looks like a good system.
I am very happy with my 3-inch net cups for seed starting and growing starts. Well, except for the lower quality potting mix I used this year. Still, I have a number of starts pushing up and through. So, I hope to have a good start on many plants this spring.

I am still at that stage of gardening where I attempt to start as many of my own plants as possible but am not ashamed to buy starter packs at the nursery for plants that I was unable to grow myself at home. A few years ago, it was all just store-bought starter packs. At least I take some pride in knowing that more than half of my plants this year will come from my seed starting efforts.