I have an AirZ Nitrox (wireless AI), and an SPG. I had the SPG before I had the computer and kept it as backup, along with the depth gauge in the same console. I have had problems with the computer losing the signal occasionally, but it soon re-establishes the link. The battery in the transmitter failed last year, two days into a trip to the Red Sea - I was glad that I had kept my SPG and depth gauge as backups.
It's never lost a signal since replacing the transmitter, so maybe the earlier problems were an indication of a failing battery?
I often use a camera and have never experienced problems with the strobe disrupting the wireless link.