Positive aspects of working at ECO Special Waste Management Pte Ltd include an emphasis on safety, opportunities to learn about chemicals, recycling, and waste management, and benefits such as working days and overtime compensation. However, potential challenges include expectations of working night shifts, handling hazardous chemicals which requires proper training, concerns about inadequate training, a perceived lack of opportunities for career development, issues with company culture such as micromanagement and lack of flexibility, and concerns about low compensation.