Super chrono does not touch the Magnetospeed, it's one of the biggest piles I've seen used on the range both in set up, usability and accuracy, using the Super chrono sold me on the Magnetospeed!!
There have been a number of negative reports from users of the SuperChrono. The stories on the SuperChrono are a prime example of the value of Forums where individuals buy and test a product and then report on that product.
When "professionals" test the SuperChrono and articles appear online or in gun/shooting magazines, they generally report positively on the unit. When the rank and file hard core shooters use and report on the SuperChrono, it commonly gets reports like bigngreen's.
I was hoping it would prove to be an accurate tool to measure downrange bullet velocity - but from what I can tell based on reading the Forums, you might as well use a stop-watch.