I bought one when I was still patching to use w/ my JB3 and I didnt have any problems. I didnt use it much though. Also, I didnt do any testing. I also ran it w/ regular 9v batts. I just soldered up a nice cable for about $4. Never did test how long it will run on a single 9v though since I didnt need to use it anymore after about a month.
But for that price, give it a shot. Cant beat it. Especially w/ all the negative posts about the CO2.
Which reminds me, you cant pass a signal to anyone else, its just a 1 way converter. Basically, if you are gonna patch w/ it, just be at the end of the chain.
Jim