To be honest I'm not impressed. It seems to be of good quality but it seems to me that there are flaws. Well I don't know if it's mine or all together with others. If you have arm strength issues, possibly due to arthritis, I highly recommend looking elsewhere. The reason is that the battery pack is not that easy to remove. It takes a lot of effort, especially for some. To pull out the battery, you have to squeeze it sideways. I'm serious. I have many battery powered tools that have a release button. You could incorporate this into your design. Second, I try to charge the battery. I tried to push pretty hard to put the battery in the charger. I thought everything was fine and started blinking red and green. On other devices I own, this indicates a bad battery. I tried again to drain the battery until I finally hit the damn thing. The charger works. Another design flaw. The device is functioning normally, but the results are inconsistent. Sometimes it works properly and other times it shuts off by almost 2psi. And lastly, right after I took it out of the box, I noticed that something inside the device was lost. Looks like something broke inside. I'm debating whether to exchange it as I think it's just the device or just send it back for a different manufacturer. As I mentioned earlier, I suggest buying something else if you have hand strength issues such as: B. Arthritis. . you won't like it