This product achieves varying levels of success depending on what you are looking for. I have a variety of hair types on my body, and this worked differently on each. The details are below.
Fine and relatively short hair (probably blonde): I have lots of this hair on my body and this trimmer works great in this regard. I have found it to quickly give me a close shave with no irritation in these areas. The best part is probably that it actually works well wet or dry. My shower has poor lighting, so I can easily miss patches of my blonde hair in the shower. Once I am in better lighting, I can quickly remove this hair with the central part of this trimmer and achieve smooth skin with no irritation.
Thick, straight, medium length hair: This trimmer took it off quickly and with no irritation, but not to the level of close shave that I would prefer, and was able to achieve on my areas with the fine blond hair. Even after many repeated strokes, it simply would not get rid of this hair to the degree that it did my finer hair. I would recommend this product here as a way to eliminate winter growth before shaving with an actual razor. It did take the bulk of it off quickly and irritation free.
Thick, long, curly hair: If you are short on money, and have time and patience, I would recommend this product. I was able to hack off my winter growth in this area after considerable time and effort. For the price, I consider it worth it. As with my areas of thick straight medium length hair, I could not achieve an entirely close shave regardless of how much time I put in. Nonetheless, I ended up with decent results for little money. I did acquire one nick in this area, but it did not draw blood, and I had none of the irritation that I get from shaving this area.
I really like the price, the ability to use it in or out of the shower, the fact that I can usually use it without worrying about irritation let alone painful nicks, and that it is battery operated. The last one might seem like a negative, but I recently lost a way more expensive shaver because I can no longer use the charger to it.
If I could change one thing about this trimmer, I would remove the top blade. Not only have I not found a use for that straight blade (as opposed to the slightly curved one on the bottom that seems to get every part of my body better), but it also gets in the way when I am trying to reach certain areas.
Overall, I would recommend the bottom portion for removing longer, thicker areas of hair prior to following up with another product, especially if you are on a budget. Additionally, I would recommend the central portion for anyone looking for a close, irritation free shave of shorter fine hair. (It does not seem to work on thicker hair). I would not recommend the top blade to anyone, and wish that they would remove it.