Judge it on your own recording.
Ours is the only transcript we can vouch for, and it isn’t yours. Run something real through it — that’s the only test that means anything.
The trial transcribes one recording of up to 10 minutes, and it is the whole product doing it — the same recogniser, the same timings, the same speaker labels. It and the file you upload are deleted 48 hours from now.
Keep this page in front while you record. Switching to another app or locking the screen makes the browser stop the microphone, and what was missed can’t be recovered.
Detecting the language automatically means settling on one for the whole recording. If people switch language part-way through, what they said in the other one may come back translated instead of transcribed — or not come back at all. Either way nothing is marked as missing: the transcript will look complete. Pick the main language above if you know it.