I am a lawyer. I used Legalzoom to form a 50/50 California LLC in which I am one of the 50% people. The stakes were low, would always be low, and Legalzoom is cheap.
If you can say to yourself "I will light this investment of my time and money on fire and I don't care" then Legalzoom is a good choice.
If the stakes are high enough, you'd be batshit insane to is an "out of the box" solution until you know what they put in the box. Maybe the documents are fine. Maybe they're not. Care to bet your new business that everything is gonna be ok?
Filing an LLC-1 in California is a commodity service.
People think the LLC's operating agreement is a commodity. They couldn't be more wrong.
Similar conclusions apply to corporations.