In teleoperation, haptic feedback allows the human operator to touch the remote environment. Yet it is only partially understood to what extent the quality of haptic feedback contributes to human-in-the-loop task performance. This paper presents a human factors experiment in which teleoperated task performance and control effort are assessed for a typical (dis-)assembly tasks in a hard-to-hard environment, well-known to the operator. Subjects are provided with four levels of haptic feedback quality: no haptic feedback, low-frequency haptic feedback, combined low- and high-frequency haptic feedback and the best possible - a natural spectrum of haptic feedback in a direct-controlled equivalent of the task. Four generalized fundamental subtasks are identified, namely i) Free-Space Movement Tasks, ii) Contact Transition Task, iii) Constrained Translational Tasks and iv) Constrained Rotational Task. The results show that overall task performance and control effort are primarily improved by providing low-frequency haptic feedback (specifically by improvements in Constrained Translational and Constrained Rotational Tasks), while further improvement the haptic feedback quality yields only