I've had great luck with my GFCI. I made it myself, and has truely saved me a number of times. I don't find mine overly sensitive at all. I hooked mine to a plywood board, and mounted the board to the side of my stand for a clean look. I recommend it to anyone.
If you'd like a good step by step to building one, Kein has one in his build thread -
http://www.canreef.com/vbulletin/sho...&postcount=103
