I have the switch panel and the radio panel.
The switch panel doesn't work yet but I'm not sure how much of it I'd want to be working. I find the magnetos, lights, pitot heat etc. quite easy to get to in the Islander (especially on a/p obviously) and as I've only got one switch panel then I'd have to compromise on the functionality of magnetos, landing lights etc. anyway.
The radio panel seems to work nicely though. Again, I haven't used it much yet but so far I've found that the LED displays light up once I start tuning it and that I can update the tuned frequencies. As the frequencies on the GPS can be hard to tune (and even to see unless you're zoomed in), I'm quite happy about this