Accessibility issues

Buried information

Inability to fix mistakes

Inaccurate data

Inadequate onboarding

Inefficient mental model

Insufficient product value

Irrelevant information

Issues outside the product

Misaligned traits and values

No collaboration features

No easy custom path

No engagement features

No expectation setting

No feedback loops

No indication of progress

No live support

No plan Bs

No self-help

No shortcuts

No smart defaults

No smart notifications

Obstacles to user privacy

Poor fit & finish

Too many choice options

Too many steps

Too much information

Unclear content

Unclear feedback or context

Unclear mental model

Unclear prioritization

Unclear task goal

Unexpected product changes

Untrusted source

Unusual navigation patterns