The Mission location is by and far the best UPS Store I've ever visited. Their service is fast, helpful and friendly unlike most shipping company retail locations like Fedex or any of the other UPS stores in San Francisco.
My first visit here stemmed from the need to pack and ship a large, fragile and unique item (fused art glass). I visited four different retail shipping locations (fedex, USPS and UPS) and ultimately selected this location to ship the piece. All the other places quoted a price of at least $100 more based upon intentionally inefficient packing services (in the case of the other UPS location) or outrageous insurance costs (in the case of fedex and the USPS). Additionally, service at all these other places ranged from embittered and resentful to outright deceptive. In contrast, the family who runs this UPS store went above and beyond, taking photos to document the piece prior to packing. The package arrived on the East Coast a few days later in pristine condition.
Since that occasion, the Mission UPS store is my go-to place whenever I need to ship something. It's relatively easy to find street parking out front during the day, and I'm always in and out within 5-10 minutes.