Micros are fun and addictive. It's easy to sit down and build two or three rockets in one evening, all on a TV table. A collection of 50 or more micros can easily fit in a small shelf space. People seem to be drawn to the micros as much as my high power stuff and often express more interest in the the tiny missiles. The only big draw back to micromaxx is that the delay is too short, another second or two would be really awesome, especially for competition rockets.