View: https://www.youtube.com/watch?v=HQlvKGYiY_A
My A74 is either a lemon or I use it way harder than the average owner does. Maybe both. Because I often have overheating issues where I'm riding the redline before shutdown.
My four month review of the Ulanzi fan:
A month after I bought it, they replaced it with a new version that forgoes the tiny-tiny suction cups on the back and uses a spring loaded bar to keep tension against the edge of the LCD recession. OF COURSE that would happen to me and I'd get something that's out of date before I can even use it properly...
OTOH, so long as you press down on the unit every once and a while to re-stick the cups, it stays in place, mostly due to me keeping the LCD closed as much as possible as another point of pressure: I can get away with this because I have my LCD turned off when I'm running my HDMI out to my Atomos since I rarely use touch screen controls. But if you don't use a monitor or rely on touch a lot, the connection will be more tenuous. If I were in that situation, I'd probably be skeptical of the new model as well and I'd probably cut off the suction cups on mine with a razor and use velcro like most of the pre-Ulanzi fans did when you had to buy them from Wish.com or whatever.
My biggest problem with the fan is that the battery is too small: the run time is mostly ok but the bigger issue is that it's a device that's not really made for a tiny lithium battery in that you're often going to run it until it dies (not good for lithium) and if it's something you don't use that often -- I only typically need it once a week or maybe even once a month -- there's a good chance that a large portion of the total charge will have bled out before you start it up. So you need to charge it right before use (anticipating when you'll need it) and remember to turn it off before it dies, which isn't exactly plug and play, since it takes a bit of planning and mental real-estate.
OTOH, if you have a serious job where you have an external battery on your tripod/rig/or in your pocket and you have USBC going to both your camera and the fan simultaneously, it's well worth the money, but not really a silver bullet. I still think that shaking your camera or moving it helps more than a fan in a static environment because you kind of dissipate the film of hot air that surrounds the WHOLE camera, increasing the rate of thermal exchange. I don't have the tools to prove that but I've found that even on blistering hot days outside, there's enough wind that I don't run into the same heat problems I do inside a town hall or board room packed with too many people, etc.
