There are certainly more powerful commercial products. But GRIP is by far the easiest to use and has some fairly unique features
- Load vision programs via HTTP at runtime, even if another one is running
- Works standalone or can generate code
- Multi-platform (many are Windows-only)
I had an internship last year at a company using robots to build custom tile mosaics. They're planning on using a laser scanner to pipe 3D data into GRIP to find the tiles to pick up, and need to quickly switch pipelines because of different reflective properties of different kinds of tile. I actually added the HTTP stuff because of that need.