Some folks like to run adventures that are fairly barebones and fill in the needed details on the fly. Others like to have everything needed (and possibly more) - this could be boxed text and or paragraphs describing the encounter / room / tactics and if this then that situations.
I fall somewhere in between. For "drop in" adventures not part of a bigger plot line, less most certainly is more. If it's ore of a mini-campaign (Razor Coast and the like) more is better, at least for me.
What do you want in the adventures you buy? More? Less? A bit of both?