The "Research Methods for the Behavioral Sciences 6th Edition" has received positive feedback for its quick delivery and excellent condition, making transactions easy for customers. It is described as well-written, easy to follow, and a must-have for those interested in behavioral science research methods. However, some customers have noted that used copies may contain writing and highlighting. The book is praised for its thorough descriptions of psychological experimental designs, examples, and basic statistical understanding. It's important to note that the book does not come with an access code.