I've had bad experiences with other pumps in the past, so I was a little skeptical when I purchased this. However, now after using the pump 3 or 4 times I am a believer! The pump is well built, quick to inflate, lightweight (it's a lithium ion battery not a sealed lead-acid), and the pressure gauge is accurate. My last "automated" pump started dying on me, and luckily I noticed it was going over pressure before it ruptured my boat. Now I use a separate calibrated gauge to make sure my boat doesn't get damaged. The pressure reading on this pump is dead-on what my gauge reads. The battery life on this thing is great, too! I had no idea what to expect, but this is much better than I hoped! I have a 13ft inflatable sport boat with a drop stitch high pressure inflatable floor (similar to a SUP) and an inflatable keel. The main tubes are 18in diameter. It took me about 20min to get the entire thing inflated. While it is working, the pump reads a lower battery level than it actually has, I'm guessing because of the voltage drop. I got three full inflations out of it before I recharged it, and it was still reading about 35% capacity left. My guess is I could have gotten four, maybe five full inflations out of a full charge. If you only have a SUP, you should get many more than this. A side note, all of these pumps are loud, but this is noticeably quieter than my last one. The added bonuses of having a USB port to charge other things with and being able to power it directly from a cigarette lighter if the battery runs out are pretty nice too. Aside from the pump itself, the company has amazing customer service! I contacted them to get an additional hose that I could modify to use other fittings for and they responded quickly and sent one to me! Obviously there's no way to tell how it will hold up over time, but so far it has been great.