I bought this for my 75 year old mother-in-law who used this daily from May through August to light incense. It was easier for her to squeeze than to use the trigger lighters that require pulling with a finger. It would have been a challenge for her to refill, to see in the clear plastic to see the fuel level, but I was able to help her and refilled it in seconds. It was very easy with the proper butane refill that is recommended beneath the lighter listing in Amazon. There was no issue regarding an "air bubble", it was simple to refill. After refilling, the lighter immediately worked, super simple. I bought a second one as backup until I can get to her home to refill any that become empty. I suspect my mother-in-law wouldn't be able to see the small valve needed to match up to the butane small hose that injects the butane. If you can assist someone with refilling once every 3 months, I'd highly recommend this lighter. Even if I couldn't refill it, it is so simple for her to use, I'd probably just buy her a new one every time, it is that simple and I haven't found a similar product.