Do you use walkthroughs/guides?

[Spuuky]

And missables, I hate missables. Especially the ones that involve going back to your home town when you've entered the final dungeon, but just entered because if you go into the next room that item is lost forever! Unless you want to play through the 80 hour game again.

And what does this item do for you? Will you ever use it? Will it ever be such a notable difference that you'll have missed out by not using it? Very, very rare are "missables" that actually make any difference whatsoever.

I never use guides or whatever for my first playthrough, but I will look things up after the fact.