We gave our kids the option of recording at home or coming up to the band hall one night last week. It was about 50/50 who did what. Easy process, no bus ride to deal with, no schedule conflicts to deal with, the kids were more relaxed.
I appreciated being able to skip through recordings where the kid was obviously sight-reading. Why in the world did their director verify that one?
I also appreciate that I can go back and listen again before finalizing. My top 2 were within a point. I listened several times before sending in the scores.
Lots of people were worried about recording quality affecting the results. Only one student had an issue enough to make it hard to judge. Their recording was clipping all over the place, like they put the mic right in the bell. Again, why did their band director verify that? They had the chance to listen to their student's recording. It was pretty clear that this student would not have made the band anyway, but I could see how that recording of a better player could have made a difference.
After listening to over 100 recordings, I suggest you try to record on your stage if possible. Too much reverb (especially on a quick piece) can hide the articulation. A little reverb is nice. That said, my #1 had a very dry recording and a not-great mic, sounded like a phone recording in a bedroom or maybe a closet. Not a great recording, but they nailed the music!
Overall, from the recording to the judging, I like this process!