for me, they are a good alternative to using fresh bait.
to get fresh bait I either have to spend a few hours catching, pumping or trapping or alternatively going to the bait shop and paying out my $$ for (usually) frozen 2nd rate bait.
therefore, for me SP's are convenient, easy to buy and store, similar price to bait and definitely catch fish. they also don't require delicate handling and storage like fresh bait and will last in my tackle bag for quite a while
therefore, I reckon even at $10 a pack they are pretty good value.
mental note, getting low on sandworms, must visit the tackle shop..... :lol: oops gotta go now. :shock: