Played a JM out in the wild at Nextlevel in Hillsboro, OR and was instantly hooked on finding one of these for the home collection!
Dang this can be a difficult game to play well - I've never played a game that required such quick reflexes and perfect execution. One miniscule bit of timing is the difference between another loop and disaster
If you haven't heard that the hand can be a pain to keep running well, go out and do your research if you're considering adding one to your collection. I've had to repair everything from the main cap on the 20v power supply to replacing X/Y nuts that help drive the hand back and forth. Mine is an early one (#18 made in the production run) and lacks a couple parts that came later (notably mine doesn't have the two outside keepers on the matrix, so balls can occasionally end up in strange places when connecting three in a row)
This is the game I head for when it's been a long day and I need to eliminate stress. This is the game I avoid when my brain is hazy, I'm sleepy, or am looking to relax with slower game play action)
I have a color DMD, so the display content is excellent given what was available in its day.