Be careful when selecting a publishing channel for an article if the publishing channel is previously unknown. The reliability of open access journals can be assessed in the same way as for traditional scientific publications. At least these should be checked:
Always watch out for predatory publishers!
Some publishers may have dubious publishing motives. These so-called vanity publishers or predatory publishers use researchers by collecting publishing fees without peer-reviewing the publications. Such publishers send out lots of enticing junk mail offers to get scientists to do all the work for them while they are only interested in money.
It is important to thoroughly familiarize yourself with the open-access journal in which you intend to publish your article.
The scientific community also discusses extensively with publishers on the net, and it's worthwhile to do a simple Google search and check ongoing discussions on the matter.
Nature magazine: Investigating journals: The dark side of publishing