Frederick Self Storage is a reliable and customer-friendly self-storage facility. The staff, particularly the manager, is consistently praised for their exceptional service and pleasant demeanor. Customers highlight the manager's patience, friendliness, and willingness to go the extra mile to accommodate their needs, even staying late to assist them. The storage units are described as clean and odor-free, and the facility is commended for its straightforward billing process, including timely email reminders and courtesy calls to avoid late fees. While some customers note the lack of prorated refunds upon early move-out, the overall experience at Frederick Self Storage is overwhelmingly positive, with many appreciating the ease and convenience the facility provides.