Insync -- it syncs up your files to Google Drive automatically when it runs, and vice versa. Sounds good on paper for backups and keeping files the same across computers, right?

In practice.. it's a nightmare. Not only does Insync actually hold your synced files hostage, it threatens to erase them on Google Drive and your other PCs if you happen to lose your base sync folder, or if you happen to lose your files on one PC. As well, it also ends up syncing entire folders that are outside the scope of what you originally selected, and if that happens to be your 100GB+ pictures..

Happened to me early this morning, but luckily I kept proper backups on external drives.