The Athlon X4 860K is an inexpensive CPU. Compared to its direct competitor, we can say there is a technical tie. In several benchmarks, they both performed similarly. In the tests where the one-core performance matters, the Athlon X4 860K was slower, but it was faster on the applications that take advantage of the four cores.
Comparing the Athlon X4 860K to the Athlon X4 880K (which has a similar architecture, but a slightly higher clock) and the FX-4300 (which uses a different platform, but has similar specs,) we can also say there was a technical tie.
So, the conclusion is that the Athlon X4 860K offers an excellent cost/benefit ratio. Considering also it is unlocked and you achieve higher speeds by overclocking it, it is a great CPU if you are looking for an inexpensive one, with good performance.