Well, I for one have used them while chartering (talk to the lads up at Shearwater who ordered hundreds of them, too), am not just learning and it only took two trips to "tune" them.
When I first started using them there was no mention as to leader strength and length nor optimal speed.
Their packaging and web site now includes all these tips learned by clients and pros alike.
It all depends if you are open to new ideas and learning something new.
I can't tell you how many times I've heard from someone that they've given up on plugs or spoons because they can't catch a fish with them.
In answer to the first post, yes, good, yes again and not sure but make sure you use scent in them.