KDEConnect pulls the whole KDE dependencies with it which I do not want while using Unity. That is the only thing that is stopping me from using it. Pushbullet works well for now.
KDEConnect still pulls in a few dependencies, but it's not 300MB anymore.
Storage is cheap nowadays and KDE applications generally are of such high quality that it's definitely worth it.
Other examples are Digikam (hands-down the best picture organizer) and Krita (which rivals Photoshop for digital artists).