First off, these things came pre-charged and ready to use right out of the box. We actually opened them up right there on the convention floor. After spending just about five minutes getting to know the units, I felt confident enough to fill the team in.
As far as how they worked, these devices were efficient, easy to use, and intuitive. We did have some issues with interference, probably because of how crowded the convention was, but our backup system saved the day.
All in all, we're really happy with both the product and its quality.
Oh, and here's a little insider tip: I grabbed a Sharpie and covered up the brand's logo and writing. I found it kind of distracting and didn't want it to take away from our recorded videos.