Some people use dedicated cameras, some use smartphones, some use iPads or similar. Modern phones/pads are very capable recorders, though I'm not sure how well they hold up during long sessions and the microphone might not be good.
I for one would be curious to see what your setup looks like (a photo of your "work area" with the camera setup visible in the photo). If there's another thread like this then sorry

My description is overly detailed, typically me, but feel free to just post a photo and/or write what camera and software you use without all the extra babbling

Camera: I am using a Canon Legria HF M56 (I think USA has Vixia models, with Legria sold in Europe/Asia) bought new in 2014 for ~370 Euro to use for other youtube stuff and it was out of production already back then. I chose it because at the time it had a slightly larger sensor than other similarly priced 1080p capable cameras, which I assumed was better for low light conditions. For a given sensor technology, a bigger sensor = higher light sensitivity = less image noise = better quality.
Software: For whatever reason I have Adobe Premiere Elements 11 (budget version of Adobe Premiere) also from 2014 I think. $80
Here's the desk where I record my reviews.
Normally this is where I do my synthesizer/electronics repairs and stuff, but it also happens to be the most suitable (empty) surface in the apartment for recording ration reviews.

(Yes, the desk, bookshelf and lamps are all IKEA. I AM Swedish after all.)
The (overhead) camera can be seen mounted on a flexible arm (Manfrotto 237HD) attached to the bookshelf in front of me with a clamp (Manfrotto super clamp 035) and perhaps some adapters... I don't remember...
At the end of the arm is a quick-release (search for "323 quick release" on eBay) base and the corresponding quick-release plate is mounted on the camera.
I also have an older Manfrotto tripod with the same quick-release plate on it so I can, if needed to, just attach the camera to it quickly and easily, but so far I find the overhead camera isn't in the way as much, though the angle can be a bit annoying because you never get to see drinking glasses etc from the side, only the surface... On the other hand I don't need a backdrop/screen to cover all the clutter in the bookshelf

What's your setup like?
Edit: Please note this is not a bragging thread where the guy with the most fancy equipment wins. It's purely informational. In fact, if somebody who makes reviews has really low-cost equipment and still does great stuff with that, even better! I get more impressed by that and it will also help others who are starting out realize it's not that important to have expensive stuff. You just need to make the best with what you have. I just tend to go a bit overboard with expenses and still not get as good results as someone who's spent a fraction of what I have. So, don't be shy or ashamed to let us and others know what you have!