From what I have seen its the only entry level gyro out there that has the abillity to do hard 3D .
The 401 is the only gyro that gets recommended at are field to new heli guys. the 401 is so solid for a newby they can work on other controls other then the rudder. very quickly they learn to hover because there not fighting the tail all the time.
cheap= long learning curve
$$$$$=shorter learning cuvre