[zwaps]

It is a good idea to get some Zotero cloud storage. The sync works perfectly for me. Since any serious library will be over the Mendeley free limit, I think it's a fair comparision.

Of course Zoteros development is less funded and less agile. Given that, I think they have worked on many shortcomings. The interface is now good, the group-based sharing works, PDFs are read and meta-data is added well. The import plugin is better than that of Mendeley.

Mendeley has an advantage in that it has a great PDF viewer and editor. But since you can not do anything with these PDFs and annotations, like export them or send them anywhere, it's now pretty much useless.

Switching is not easy, but in the long run I don't think you'd be faced with much issues going from Mendeley to Zotero. It was certainly worth it for me.

As it stands, you can still import from Mendeley to Zotero, so I'd at least do that now, until Elsevier finds a way to shut this down completely.