The UPS Store on base offers convenient services for customers, especially for those needing to drop off Amazon returns during lunch or after work. While some reviews mention issues with the store being temporarily unattended, others highlight the helpfulness and professionalism of the staff. Sunny has been recognized for his assistance with notarizing forms and guiding customers through the process, while Robert has also received praise for consistently providing excellent customer service. Overall, customers appreciate the quick and friendly service, although they hope for improved reliability with employee availability.