fast enough grip, easy connection and high-speed recognition by the PS3. The camera must be as close to the TV. If the parallax really disrupt the games. Allow room for play (3 m. Between the player and the TV to some games, and less for others or Echochrome Tumble style). The ball is really bright against when playing in a dark room, almost dazzling.
Otherwise, it is precise and good gameplay. My 4 year old daughter is doing well with Tumble!
By cons, only flat, like the standard controllers, charging (battery) is very long ...