I field-tested these for Fox some years ago (before they were released) and my field test conclusions were that I only considered them of use in weed-free conditions, and really one could achieve the same objectives with standard back-leads anyway.
I have not used them since.

What are members experiences - good or bad -with them?

Ive been using them on my last few sessions. I agree that they do the same job as a standard back lead, but i find them marginally more convenient, (as they're already threaded onto the line). Also when you cnnect with a fish, you get a more direct contact, as the smaller size lead isn't as cumbersome.

I make my own, utilising a tulip bead wrapped in heavey metal. I agree with Mr Selman that their uses are limited in weed type scenarios. If weed is present I use a power gum stop knot three foot up the line from the lead core leader, if the fish does get snagged the stop knot just slides up the line no problem.

I just like being assured that the terminal tackle is on the deck, flying back leads are definately the way forward.

You need to be very careful with these, a mate really liked them and used them all the time, until he started getting cut offs. Essentially the flying backleads were a tiny bit sharp and therefore slowly chaffed the line. I think they are made of a hardish metal as opposed to lead, which is obviously softer but legally can't be used in those sizes.

Rob.

i used them but they clutered about to much on the rods in transit so i stopped using them. this too was around the same time that i started to fish a weedy water.

in my opinion normal backleads are far superior as they pin the line down more and also alow line through more easily or better bite indication.

squiz

i use the gardener flying backleads (only because our tackle shop doesnt do any others!) They are not the best as they could be a better shape to "fly" up the line. But they work. I think they act as a long leader. thats is the only reason i use them!

I use flying back leads a lot. I used to buy very small leads with a 1mm hole through them from my local pet/fishing shop they were the only place I could get them from. I now use 'worm weights' which I got from the States. They are tiny bullet shaped leads. I use them because I am sure I get better results by ensuring the last few metres are tight to the bottom.