Over the last few years I followed the debate about the frontiers journals. I noticed that the reception seems to vary wildly depending on the field. While some parts of the frontiers group seem to be more predatory, other are well received in their field. As I could not really find a pattern in what fields frontiers is reliable, I wanted to ask for opinions about the frontiers journals in the field of hydrology. Several hydrological researchers I think highly of have published in frontiers. So, what are your experiences as editor, reviewer and author with frontiers journals in the field of hydrology (I think the most fitting are probably Frontiers in Environmental Science, Frontiers in Water and Frontiers in Earth Science)?