I use a Fortress as my primary anchor and love it. True that you need to get it on the bottom, but I have had that problem only one time in the 5 years or so I''ve used the anchor -- and that was out in a river trying to anchor in 25 knots with 3-5 foot rollers coming at me. (I was the committee boat at the finish line for a race so HAD to anchor in a specific spot. Took me 3 tries to get the anchor down, but then it held like mad!)
You may need to let out more scope with it at first than a Danforth, but once it starts to dig in it''ll set well. I used to have 6 feet of heavy chain and have increased that to 20 feet after the river episode, but that does get the anchor down in almost anything.
It''s a good anchor. Go with it IMHO.