Biomed Central is an open access publisher with a list of journals belonging to the BMC series, where they state that:
The BMC-series subject-specific journals do not make editorial decisions on the basis of the interest of a study or its likely impact. Studies must be scientifically valid; for research articles this includes a scientifically sound research question, the use of suitable methods and analysis, and following community-agreed standards relevant to the research field.
All these journals start with BMC in their name (e.g. BMC Bioinformatics). While I understand this statement that they will publish anything that is not utter bullshit, they also have highly selective BMC journals (e.g. BMC Medicine).
On the other hand, they also have highly selective journals without the BMC tag, e.g. Genome Biology.
My question is, how reputable are BMC journals? How selective are they? Is this really journal dependent? Many of their journals have quite high impact factors and are ranked high on scimagojr