I've tried them three times this season.
First cast on a new Spro with teaser. Get slammed as soon as it it bottom. Leader broke at teaser. Line looked like and hit felt like it was a yellow-eyed demon. One new belly strip, Spro 2oz, teaser hook and Gulp shrimp donated.
Rerigged and second attempt yielded some bites. Got one short on the belly strip, two on teaser. Felt some quick short bites, reeled up and belly strip now belly stub.
Third attempt produced another short, but by then drift slowed and went back to 1oz spro with trimmed down 6" Gulp power grub which produced two keepers.
To me the jury is still out on the belly strip. Did seem to get turned into a stub way too quickly. Did swim pretty nice though and warrants another try or two.