Here is a good article to use as reference when coming across the usual concerns about Open Access Publishing

To summarize:
1) OA journals are peer reviewed (in the main)
2) Not all charge article processing fees (and a lot will waive them)
3) It is not a choice between impact/prestige and Open
4) OA is for first rate work, not just “stuff you can’t publish elsewhere”.
5) Archiving in repositories does not violate copyright (most of the time)

Lots of good references, and an easy, short read.

https://theconversation.com/busting-the-top-five-myths-about-open-access-publishing-14792

~Anton.