What questions to ask to a research lab to ensure that it's a good lab?

Aug 21, 2016
Pre-Health (Field Undecided)

I have received several interview offers for research assistant positions.

I have worked in some labs before in school and even though I had been extremely lucky and enjoyed them, I have heard of crazy stories about people hating their PI's / colleagues / doing lab monkey work / PIs being vindictive.

What questions can I ask during the interviews to make sure I end up being in a good, productive lab? What are some red flags to watch out for?

Thanks! Any advice would help.