I like them, & fish with them. Tried Orvis braided leaders- they threw too much spray. You really notice it when the sun is in front of you.
I mainly build 6/0 Uni thread leaders, grease them with mucillin and touch them up with some Aquel during the day. Not a lot either. I use them for nymphing too. Only I use mono there. I find they have less drag and it mends well. I use a 5' furled with up to 4' of tippet. Haven't broken off any fish either. I use a handshake setup to connect them.
Kathy Scott's DVD is worth the money. You can buy one of Xxxxxxxcrafts furled leaders, or spend about $2 more for Kathy's DVD. No brainer there. Right JC?

RTJ