Another very strong uni-knot fan here (double meaning intended.) The "secret" to good uni-knots in mono or fluoro is to lubricate and pull up slowly using both the standing and tag ends. There's even a variation of the uni that produces a non-slipping loop, whic is great for lures that need a lot of freedom to produce the correct action. It's cleverly called the non-slip mono knot. See it and many more really good knots here
http://www.animatedknots.com/indexfi...matedknots.com