depends on the bottom
A Danforth type is the best (for its weight) in sand or mud. I have never had a problem, nor do I expect to experience one in that sort or bottom. If you sharpen the flukes a bit it'll grab a little better in weed...but for weed and rock bottoms, a bruce is apparently the way to go. Now, a bruce also holds well in mud/sand, but you do need a heavier anchor to be as effective. If you anchor in a variety of bottoms then consider a bruce, it's much more flexible. But I still like the danforth in mud/sand.