To give you the "best top" review, it is important to first clarify the hardware situation, as there are two versions of this device that are often confused.
What specific (e.g., automotive ECUs, motherboard BIOS, vintage EPROMs) do you need to program?
Identify the you need for specific chips (like PLCC or SOIC). Troubleshoot "ID Error" or communication failures.
If you use Linux or macOS, the official Windows software from XGecu isn't an option. The open-source community comes to the rescue with the minipro suite, which provides the primary way to use the TL866CS on non-Windows platforms.
The TL866CS is a legendary tool among hobbyists, known for its incredible versatility despite its age. While it has been officially succeeded by the T48 and T518 series, the software and legacy of the original "Minipro" system remain a cornerstone of electronics repair. The Heart of the Hardware: MiniPro Software