My division is the test division for our city. I also used them about ten years ago. I personally think they are a good thing.
They're good for court, training, and resolving personnel complaints.
Get in a good pursuit and bring a video tape of it to court and you've got close to a slam dunk case.
If something goes down, you can watch the tape and hopefully be able to see some learning points. This is especially good for FTO's working with new officers.
Have a citizen make a false complaint against you and if it's on tape, (whether it be video or audio) you're more likely to be exonerated.
I would recommend them.