I've found this to be a good addition to my training. You have the option to go for speed or power punching, this is determined by how much force you need to apply to knock the light out. This is done through the position of a switch on the torso.
There are also different types of use, one is a sequence type exercise where the lights appear in a set sequence that you must follow, this sequence is repeated constantly for whatever time you require. (For example it may go right hook to body, left jab to face, left jab to face, right uppercut to face, left hook to body, right jab to face continuous) The sequence will change depending on what level you choose.
Another option is the random level where lights appear randomly with no set sequence and it's down to quick reactions to knock the lights out quickly.
You have a timer that can be set in minutes, once the time expires an audible beep starts and all the lights go out, great if you want to train for 3 minute rounds or more, it also displays the number of lights punched out.
The problems found are that regardless of how full the base is with sand it rocks about, the best solution I've come up with is to place it directly in front of a wall, this way it isn't going anywhere. And as previously stated the base will mark delicate floors, again I prevented this by buying some exercise mats to place it onto.
Overall a good piece of kit.