At first, it may look a bit large for those who develop directly on a regular TI-83 Plus, but in the end, the extra memory requirement over other shells and libraries is simply worth it: First of all, you have an interface where you can perform the typical shell actions such as archiving/unarchiving/unlocking/deleting programs and obviously running programs, but there is many more! If you cannot get used to the mouse, no problem, Doors CS also allows you to run everything from the PRGM menu, like any BASIC program, and your main program launchers can remain in the archive.

In addition to that, its instant-Goto feature makes TI-BASIC development much faster, as we no longer need to wait 30 seconds for a program code to finish scrolling when an error is encountered at the very end of 15 KB of code. Axe source files are also detected, so trying to run them will open the BASIC editor where you can edit them. Also, like on a TI-81, the BASIC editor has 8 lines instead of 7.

This is not all, Doors CS7 also pretty much packs xLIB, a bug-fixed version of Celtic III, some Omnicalc commands and many extra BASIC libraries. Basically, this means Doors CS7 alone will be able to run regular BASIC games, any z80 assembly game and also xLIB/Celtic games such as Bowling, Reuben Quest or Yumé. In other words, it pretty much lets you run everything and is also a very great tool for development.

Stability-wise, I couldn't encounter any problem when running version 7.0 and 7.1 of Doors CS. There were a few bugs in the 6.0 branch, but the author worked hard on fixing them since then.