Yes, gwyn - used them a fair bit last season. Didn't buy the weighted vane for them though - fished them weedless rigges Texas style on a 4/0. Very effective down South Pembs although young George had the knack with them better than me - just twitched back sub-surface. I bought a pack of the eels only from Sharnbrook tackle I believe and will get some more when the last couple bite the dust. Very good little lure - I've done better with these than Slug-Go's personally. You could put them on the weighted hooks I guess as they don't sink very fast at all. Heavy enough to cast though.
Maybe someone else can tell you what they fish like with the weighted vane they sell with them?