They're better actually. That said, you're going to really screw some stuff up occasionally. That's why you take notes, and make small quantities to start.
And, it may taste bad the day you mix it. But a week of steeping, it taste like heaven. So never pour it out, unless it's REALLY F'd up. Give a test run a week or 2 to steep, before you trash it.
But the majority of mine are good to go, same day.
It's not that difficult really. Just read through the DIY section, and ask questions.
There are a ton of recipes there. You can quickly do a cost analysis of what's needed if you know what Flavors you like. And the cost, will drop as you move into future supply orders. Unless you run out of everything all at once.
Quick breakdown.
I've got about $60 invested in PGnic, VG base, and 4 Flavors this week. The next order, (if the PGnic base is okay), will be significantly lower ($35 USD) as I won't be needing additional flavoring. This single purchase, will last me almost 3 months. As will the next, but at half the price.
I figure 5 months worth of juice, well worth $100. And a couple of hours of my time. Just saying.