I've only been using fluorocarbon for the last year and I've always connected it to braid via the double uni knot and used a clinch knot from the fluoro to the lure.

I've never lost any fish and landed smallmouth up to 5lbs using those knots and feel pretty comfortable tying them so I'll continue to use them for the forseeable future.

Improved Clinch for Fluoro gets my vote