Hi,
I was (and still am) using a Suunto D9. I was the only one on the boat using a wireless transmitter. The strange thing was that on one of the dives where it failed pre-dive it all of a sudden started working once I started my safety stop. From my perspective the technology is not there yet, and will keep on diving with both SPG and transmitter as I said before.
Hope this helps....
Best,
Gil
I've been diving a D9 without a backup for years with no problem until last trip (last summer), right after battery replacement & software update. I'm suspect of the software update--heard stories on the boat about others with similar problems after the update. I've been guilted into getting a backup pressure gauge just so I don't have to listen to the divemasters tell me "no professional dives a D9 without a backup."