When giving feedback here is are some good rules to follow.
- Always have something positive to say even if you are giving bad feedback.
- Give good clear things that they can improve. Be clear about what you are suggesting.
- Don’t make it sound like they have to do the improvements.
- Give them the why to do the suggestions.
- Don’t tell them you won’t use their product until they add this or that feature.
- Provide all the information you can, including screenshots with annotations.