I bought a Falcon last year--tried it in the goldfields--found nuggets, flakes, and flour gold with it. It is not, as others have stated, a primary gold detector. It is however a great little sniping detector, and a prospecting detector when you want to see if there's even a tiny amount of gold in a small sample.
I had trouble with the first one--the cable was loose in the head--so, I had the head replaced. The people at Falcon are very helpful.
It really sings when it hits gold and makes the funny "boing" sound mentioned earlier when it hits magnetite [aka--black sand] (and some other hot rocks). If you're working a small patch of bedrock that had good gold come from it, you'll have fun. If you try to work a large area with hot rocks--you'll go stark-raving mad.
It's not a refined gold machine--far from it. It's a basic little metal detector with a few improvements. It's a fine little pinpointer that makes finding specks of gold much easier, and finding small nuggets and larger flakes a breeze.
I have the case and the plastic wand, but I'm still disappointed with the chatter from the probe. If I tape the cord off to the side with gorilla tape, it quiets right down, but then I can't use the wand. I'll have to get in touch with Falcon again to see what they have to say. I'm being as honest as I can here, as you wanted some decent feedback.
Would I buy one again? Yes. Would I ever think about using it as a primary gold detector? Never. But, I don't believe for a minute that is its intended purpose.
All the best,
Lanny
P.S. read about the Falcon on my thread (listed below)
http://www.treasurenet.com/forums/metal-detecting-gold/69-bedrock-gold-mysteries-60.html