I have used both Schaum's General Topology and Munkres, and think that Schaum's is a great choice! Both have their advantages, so let me elaborate a little below:
Exercises: Both Schaum's and Munkres have plenty of exercises, but the solutions in Schaum's are very helpful. Further, I would say that for self-study Schaum's has the edge, since it has more exercises that fall in the "easy" range. These are the kind of exercises that help you really get comfortable with new mathematical objects and ideas. Munkres has some of these problems too, but I would say that the distribution is more weighted towards problems that develop new, and sometimes challenging material.
Material: Both Schaum's and Munkres cover roughly the same material, with the exception of Algebraic Topology. Munkres is divided into two sections: the first is general topology, and the second is Algebraic Topology. Schaum's covers roughly the same material as in the first section of Munkres but doesn't have the second section at all. If you're interested in going beyond what most people would consider a standard introduction to general topology, then go with Munkres. That being said, I think it might be best to go with Schaum's and really learn the basics well, then choose a book that's specifically about Algebraic Topology.
Hope this helps, and you really can't go wrong with either - they're both great books for someone who's new to the subject.