What are the pain points of Business Travel?

To all the Business Travelers out there, I have a few questions.

- What are the pain point when travelling on a business trip?

- Do you plan yourself or is there somebody who does the trip planning for you?

- What are you stressed/concerned about when going on a business trip?

- How do you claim back money back from your company? Is it 100% of the spendings covered? Are there policies to what you can claim back?

If there is anything you would like to share, please do so :)

Any input would be much appreciated!