Phrases Complaints and Suggestions

I have serious reservations about this.

C2

Meaning

I have strong doubts or concerns about this.

Example sentences

John: 'I think we should proceed with the merger.'<br>

Alice: 'I have serious reservations about this. We need more due diligence.'

John: 'I have serious reservations about this. It's not adequately tested.'

Alice: 'They want us to launch the product next month.'<br>