So far I've had the same problem as z111367 (9/24/02 review; in my case I'm on a G3 400mhz iMac DV with 600+mb RAM, running 10.2.3): it downloaded fine, but when I try to open it the app starts loading, shows itself bouncing in the Dock for a few seconds, and then disappears. Nothing ever appears on the screen. I've emailed the developer twice now, and am hoping for a response. The idea and presentation looks great, but I can't get the darn thing to start. Once I get a response from the developer I'll post a follow-up review.