[zwaps]

I never used the Mendeley plugin, but I imagine it must be pretty horrible to store PDFs from all the convoluted sources and proxy setups or library file-servers that universities use. It probably only works well if you logged into your Elsevier(tm) account.

In any case, the Zotero plugin works great and just saves Metadata and PDFs, as it should. For the usual preprint or paper providers, it works perfectly.

So even here, using Mendeley is just bad.