No, the application itself is not a virus, but according to many review websites, the service is known to be avoided because of very expensive features, incorrect info about unlimited storage, data encryption, etc.
If you don't want it on your computer, then use Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.
AdwCleaner will take care of remaining pop-ups and any other promotional offers.