So this isn't my first laser hair removal rodeo; I have used another home device and have that for reference. This one is better, by far, just by the instructions alone. The thing about laser hair removal is that it's a process, takes time, is a bit uncomfy, and it may not even work for everyone. I've found that, by following the upkeep, it does seem to reduce my hair growth. For reference, I have tan skin and thin, dark hair. Apparently, these devices need a contrast between hair color and skin color in order to work, and if your skin tone is too far on either end of the color spectrums, it won't function properly.
I've found that it does seem to reduce hair growth; you need to shave the area before using the light (the absolute tiniest shaving razer I'd included, though I didn't use it because I thought the novelty of its smallness was too cute to use). At the beginning, the hair grew back after treatment, but eventually, after going the 3 uses our week route, I found that the hairs slowly began growing back slower. While I think this works, it feels like just shaving with extra steps, and waxing would probably just be easier and reduce growth, to a lesser extent.
The instructions claim that some skin discomfort and redness might happen, and I didn't experience that too much, even though I have sensitive skin. But this device is really nice in that it has a 'cooling' feature, so I tried to anyway. This feature does feel quite soothing. However, if I had felt any significant pain from the hair removal that required soothing, I likely would not have continued using it.
Back to the instructions, I highly recommend reading them all the way through before using the device. The buttons are a tad difficult to read, and usage isn't really intuitive. You don't want to get the light going when it's not again skin or without the included sunglasses; it is bright and a definitely jarring if you're not expecting it. Though, it does need to be plugged in in order to turn on; it doesn't charge.
I'm basing this review on the device itself and not really these devices in general. I think this one does what it's supposed to do to standard (over time, continual use), and if you're looking to try it out, this is one of the better ones to pick.