It develops many problems after a short period of time. Overheating, noise, it won't start... in 5 years I threw away 4.

I read in the comments about overheating. I believe it is due to the fan being blocked. You need to adjust the two screws on the head. Also, if the body is inserted crookedly, the fan will stop again. In general, it does not have good airflow, it is somewhat noisy but it has lasted for several years.

It was installed by the home builder and after several years and many hours of use, I replaced it to install one with a check valve. Well, it's the only one that lasted (and still lasts) for so long! All the others, so far, have burned out after a few months to a year of use, approximately. If installed without forcing it, it is not particularly noisy. It is also economical. For spaces that do not require a check valve, it is a good, economical, and, based on my own experience, reliable choice.

It lasts for 1 year, it's the 4th one I get so I don't have to drill new holes! But as long as it works, it does a very good job.

It has almost no torque, resulting in not being able to start after a short period of time.

Unfortunately, I threw away the case so that everyone could see that the plastic melted due to overheating. There was a lot of noise after a very short installation period (about 2 months) and after a while it simply stopped working. However, overheating is a problem because the melted plastic covered the screws that held it together and I couldn't unscrew it. A one-minute job took me about an hour. Stay away

I chose it for its low price. It worked for about a year, until it stopped. After uninstalling it, I found that the casing had almost melted, presumably due to (unjustifiable) overheating. I replaced it with the same one (so I wouldn't have to make new holes for installation), which worked for 2-3 months, until it burned out as well.
It is very noisy, but the air suction is satisfactory (while it is working).
I will not choose it again

Stay away from this company. I have bought 2 identical models like this. One was installed by a plumber in my house and the other one I installed in my shop. The one in my house lasted about a year and stopped working for no reason. While the other one caught fire within 2 months and melted the plastic because the motor turned and the fan flew off! When I took it back to the store where I bought it, they told me they would send it back to the company to replace it, but after 2-3 days when I went to the store, they told me that the replacement is not possible and without any reason. So, DO NOT prefer this company unless you have fire insurance in your house or shop!