I use OP-1 Field for some voice recording. Initially I thought it was perfect. Unfortunately, it has some low-volume digital hum if I amplify the external microphone enough. Not a deal-breaker for “consumer-grade” work, but still kind of annoying if you want to do something with highest possible quality.
Although, my read audio interface has a far more noticeable noise problem.
With a bit of EQ on Field, the voice capture itself is really nice. Way richer than if I just plug the same headset directly into my computer/soundcard.