I think I recall that IronNoggin said he did extremely well with the copcar version.
Personally I have tried the copcar, blue splatterback and purple splatterback - caught fish on the purple splatterback only, but generally did not find these lures productive.
I suspect it is very important how these lures are rigged and I probably did not do mine quite right.
On the other hand I found the Silver Horde Coho Killer spoons very impressive - caught lots of fish on them. Only problem is they get straightened out when fighting a fish and need to be bent back in shape, which causes the paint to peel off.