Anyone here use a Bitcoin ATM anywhere? What was your experience like with them?

I saw these two articles that talk about the popularity of these ATM's and how much they're growing every day.

https://coinatmradar.com/charts/?utm_source=The+Daily+Bit&utm_campaign=920580fa66-EMAIL_CAMPAIGN_2018_08_07_01_35&utm_medium=email&utm_term=0_74539b8bec-920580fa66-38042251#by-country

and

https://bitcoinist.com/the-future-of-cryptocurrency-atms-has-arrived/

My other question is if people are worried about the security of these things.