I have a Plus/4. Shortly after realizing how limited the 3 + 1 software was and buying the better word processing cart, I realized that both the 3 + 1 and the cart were ROM based and I swapped the ROMs. That made a big improvement. I had a small TV that I used with the Plus/4 (toted in a milk crate) to give me a portable computer. There was a great jet fighter game, which included a spoken female voice of the plane advising of the damage taken on, which was really very cool for the time. I got many hand cramps holding the base of the joystick while I pulled the plane in various directions.
The included BASIC was fun to use. I even wrote a program to help translate C64 BASIC to Plus/4 BASIC (the main difference being that Peeks and POKEs needed different addresses from one version to the other).
The power supply started dieing while I was finishing my final master's paper, to the point that I would print one single page, turn it off to cool, wait 5 minutes, repeat. It only took all night to print the 40 - 60 pages! I finally chiseled my way into the PS and replaced the 7805 5V. regulator.
Now it sits in the original box in the garage.
