I had the opportunity today to train with 2 BB belonging to a friend in my training group.
He just bought 2 "4 shooters"; one with regular sound and one with advanced sounds.
I liked the advanced sound (duck sound was used).
The bumpers were visible (black & white rubber with black & white streamers).
Bumpers were consistent where they were landing.
Took some time to reload but not bad.
The "chirping" of the regular BB sound was absolutely useless. We ran about 10 dogs......NOT ONE turned their heads toward the short mark where the "chirping" was being used Several of us commented between marks how the "chirping" from the BB sounded just like the birds in the trees around us
Bumpers tended to land black side up in the pond. This was not bad for the big dogs, but we were running two pups who are about 4 1/2 & 5 months old. If the white side had been showing, it would have helped build their confidence (as it would with the big dogs if they were having trouble), especially in and around the decoys.
I can't comment on using the transmitter as I didn't use it. However, there were a couple of times we did have to remind the person operating it to "arm" it.