Will it work? Or is it a placebo?

When I first encountered beauty devices, I thought it would be a whole new world, but now that I’ve actually been using them, I keep wondering if they really suit my skin type. Since I have sensitive skin, it’s difficult to tell if the redness I get after using a device is a normal reaction or a side effect. I also don't know how consistently I need to use it to see results. I constantly worry about whether the effects I’ve built up will disappear if I take a break, whether this device is truly worth the price, and whether it lags behind other devices on the market these days. So, looking in the mirror every day, I really can't decide whether to trust this device and keep using it.