The familiarity of spell check, running in your IDE. Instantly spot mispelled words in comments as well as mistyped symbols. You can even check spelling against a custom dictionary. Visual Assist X will repair case errors automatically, and even convert dot to -> when necessary. Most importantly, correct your mistakes before you build.
Spell check comments and strings as-you-type, or run spell check in batch mode.
Underline mistyped symbols as-you-type so you know immediately if you're mistaken about a symbol name, or you're using a symbol out-of-context.
Move your text caret into an area containing braces or parentheses that are not properly balanced and watch the mismatched brace highlight. Correct your code before building.
Type a symbol with improper case and watch it get repaired immediately.
Specifically for C/C++ users, automatic conversion of dot to -> avoids wasted builds and the solving of difficult runtime errors in cases where either operator will compile.