And for surface mount it won't work at all. It needs electrical contact to heat up, since it's not hot all the time. Can't get that on surface mount components.
Try soldering a few hundred joints on a pc board with it and I bet you'll fire that silly toy across the room and buy a proper anti-static temperature-controlled real soldering iron.
They're marketed to their target audience - home-handyman-do-it-yourselfers who just want to solder the odd joint.
Here's one of several reviews I looked at: