I use it to power 6 case fans in a desktop that didn't have enough connections on the motherboard. 3 fans are 4-pin and 3 are 3-pin. They all work without any issues. All the fans are simple and not RGB LED fans.

Flawless hub. The packaging even includes a Thermal Sensor cable if your motherboard supports the t_sensor pin. It is a thin cable that accurately provides the internal temperature of your case or wherever you place it.

I have had it for over 2 months, and I have connected 3 4-Pin fans to it. The PWM works perfectly. It draws power directly from the power supply to be able to serve up to 10 fans, and it connects to the motherboard with a 4-pin for PWM. If you connect 2/3-pin fans, as is normal, the PWM will not work and they will run at 100% speed.

It is secured to the computer with velcro adhesive, and installation takes a few minutes. There is also a FH-04 version available, which has 4 ports, but from what I understood, it does not connect to the power supply. It draws as much power as the motherboard provides to the 4-pin header, which doesn't sound very safe to me... The FH-10 version is indeed more expensive, but it does not strain the motherboard in any way.

For 4-pin, it is perfect and works flawlessly. For 3-pin, it does not allow you to adjust the speed at all and everything runs at full speed.
Specifically, I am using it with 9 Corsair LL120 fans and I am fully satisfied

Too good to be true, unfortunately the hub was not working, very poor build quality.
Better keep your money and buy something else

The device supports up to 10 4-pin or 3-pin fans simultaneously, and has the ability to provide RPM control for fans as well as the ability to adjust the desired speed through the BIOS, but ONLY if you connect 4-pin fans! If you connect 3-pin fans, they will run at their maximum RPM and there will be no control or adjustment of the RPM! This is something important for someone who may have a build with several fans and wants to play at low speeds (for example, for quietness). Personally, I connected 6 Corsair QL 120 fans to the device, and everything worked as I wanted without any particular issue. The only significant problem I encountered and must mention is that the first device I ordered arrived DOA, and the second device I received has a small issue with the SATA cable provided in the packaging, which, when bent or obstructed in certain angles, does not make good contact with the device's port, resulting in a loss of power and shutdown.

Very easy installation (mainly because it doesn't have RGB and stuff), functions without problems and takes up minimal space in the case. All the cables disappear since they no longer connect to the motherboard and are hidden behind. I recommend it to everyone who needs at least one extra fan connector because: firstly, it doesn't work with the amperage of a single connector but has its own power supply, and secondly, it has the convenience that in the system (BIOS) all connected fans appear as one (whether it has 1 or 10 connected to the FH-10), so you only need to adjust once and they all work the same. Just for your information, in my FH-10 I have only connected PWM fans (adjustable speed with Pulse Width Modulation) and I don't know how it works with regular ones.