I own an Atari Stacy 4 upgraded to run at 16MHz which we thought was great at the time. I ran the office for an Atari software developer known as CodeHead Technologies in LA. I was also the last sysop standing in the Atari Roundtable on the GEnie online service. My Stacy is still operational, though I need to put a new hard drive in it. The main drawback was the rather dim display, but some people put tin foil behind it to brighten it up. The battery was actually a single motorcycle-type battery, so I believe 12v was what it ran on. They never lasted 5 hours. In fact, you could barely get through airport security on one charge. I have used it as recently as two years ago on stage to run my MIDI gear. The ST series was a great deal more reliable than a modern Windows PC as far as MIDI goes. If you move the mouse on a slow Windows machine, a MIDI file will slow down. No so on the Atari. The keyboard was very satisfying, probably the best Atari made. I'm looking for instructions on how to safely open the case. I also have the Atari Falcon 030. It did hard disk recording before Windows was invented right out of the box. VGA, SCSI II and AppleTalk-style ethernet were built in, too. I can also connect it to the Internet. Not many machines of that period can do that.