I downloaded a trial copy ages ago - Literature and Latte have an incredibly generous trial period which (from memory) is thirty days' use, which are non-consecutive, so you can spread them out.
It seemed like it would be a great program for jotting down notes, brainstorming ideas, and so on. And I'm sure that's how it works for many people, however my brain just wouldn't deal with brainstorming by typing. I quickly realised that when I'm brainstorming I like pen and paper, even if that means multiple sheets of paper. It might have been different if I'd had one of those fancy tablets with a stylus I could use as a pen, but for me typing random bits didn't work at all.
On the other hand, I love scrivener but I use that for writing, when I've got my basic premise already decided.
Because if the generous trial period, there's nothing to lose by giving it a go - it might be just what you need.
