This chapter provides a direct, experience-based examination of altitude training. Personal accounts from athletes like triathlete Andrea Hewitt and coach Craig Kirkwood highlight the critical need for individualized application and meticulous planning, confirming that benefits, such as improved fatigue resistance and enhanced threshold efforts, are highly athlete-dependent. Coaches and athletes detail practical implementation, favoring locations like Font Romeu and discussing the careful management of training loads, especially during the acclimatization period. The experiences underscore the value of objective monitoring (e.g., hematocrit, SpO2) alongside athlete communication to fine-tune training stress. Ultimately, altitude training is viewed as a vital, high-investment tool that, when applied progressively and intelligently, delivers tangible performance gains, provided the inherent risks of overtraining and illness are well-managed through mutual trust and data-driven adjustments.