It's a good tool for the GM ALDL, JEEP RENIX, & FORD EEC IV, OBD1.5, and even early OBD2. It's missing a few important functions like GM ABS bleed tho.
I kept my MT2500 for the OBD1 adapters and occasional use. The brick and cartridges aren't worth a lot without the adapters.
I use my 12.4...