In table tennis, footwork is important for all levels.  Using the Newgy Robo-Pong 2050 is one of the best ways to improve footwork.  Most players try to improve their side-to-side footwork, which is important.  However, only a few players try to improve their in-and-out footwork.
 
In-and-out footwork is vitally important for the slow block, especially when you are away from the table.  Watch how Joo Se Hyuk demonstrates the stepping in on this video:
http://www.youtube.com/watch?v=In5lWiDQdpg&list=UUljeDpWqSZkmqwNBDoMHosw&index=11&feature=plcp
 
Using the Newgy Robo-Pong 2050, I go to:
Normal Mode
Topspin
Head Angle 8
Speed  12
L Position 10
R Position 20
Wait 1.40
Oscillator ON
Speed Random 5
 
This drill will give me varied depths of balls to my forehand.  I focus on staying away from the table, then stepping forward for the slow ball.  I suggest adding this drill to your daily training routine; you will be seeing major improvements in just a couple weeks.