Its a great shot. Especially against some of the intermediate 'power hitters' I play against. Without having a hard shot played at them, they have to generate the power themselves and dig the ball up to get it over the net, the amount of errors made makes it a very effective weapon to gain control of a rally.
Executed well, its a great tool, executed badly and you feel like a tool.
"Tennis is just chess with balls....zugzwang"
"The older I get....the better I was"