I’ve been using the Airhead SUP Velocity Pump since summer 2018. I don’t have to inflate my boards every time I use them, so I’ve used the pump probably less than a dozen times. It’s pricey, but all other options I considered were too slow for my needs, didn’t have an auto shutoff, or were too big (such as a legit shop air compressor). I can power it from a motorcycle battery so I don’t have to run my car while the boards inflate. That said, the previously mentioned method of using a cheap mattress pump followed by a manual pump works pretty well if you don’t mind the workout. PS: This is my first post on Reddit! Happy it’s about SUPing.