Build Quality:

The Cooler Master Quickfire TK is a sturdy keyboard. Made of strongly enforced plastic, it gives the keyboard a very nice feel while not giving it any space to flex.
The housing of the cooler master quickfire tk is also very sturdy, with 2 metal plates inside the layers between the keyswitches and the circuit board, giving the keyboard once again a very rigid feeling whilest at the same time, preventing any keyswitches from being damaged if too much force is exerted on it

Backlighting:

The backlighting of the Quickfire TK exceeded our expectations, producing a vibrant and bright red backlight.
This is most likely due to its white coloured backplate, which helps the Quickfire TK reflect any light which hits it, back into the keycap, providing the user with some of the best backlights in the market currently.
There are three modes that come with the Quickfire TK, which can be toggled through the fn keys + the F1 to F4 keys. Firstly, there is a static mode, where the red backlighting remains at one brightness level, adjustable by the user.
The second mode available to users is the breathing mode, where the keyboard cycles through all brightness levels, going from its dimmest setting slowly up to its brightness and slowly dimming again where the cycle starts over.
The last mode that comes with the keyboard is WASD mode, which only lights up the WASD keys on the keyboard as well as the arrow keys, which helps users easily identify the keys which are commonly used when playing First Person Shooter (FPS) Games. Overall, the Quickfire TK has some of the best single colour backlighting possible. Although many keyboards these days have RGB addressable backlight, the Quickfire shows that even though it is a single LED keyboard, it can still stand up to the other higher end keyboards in the market as a contender.

Keyswitches

For keyswitches, the Cooler Master Quickfire TK comes in 4 keyswitches. They are the cherry MX reds, blues, browns and greens, with each switch having its own backlight colour. For example, red switch models would have a red backlight and blue switch models would have a blue backlight. However, the brown switches come with a white backlight.
The keyswitches themselves however are still the best part of what makes this keyboard good, using Official Cherry Switches on a keyboard at the price range is rarely done, but cooler master has done it and has done it well. Our model, coming in with Cherry MX Red switches, has a 45g actuation force, while being a linear switch for commands being executed fast and swift.
The keyswitches feel good to the touch, no key wobble is present when the key is pressed and long term usage doesn't cause fatigue to the user. However, the only problem with the keys is that the keys themselves may sometimes actuate when little pressure is applied, which is a fatal flaw for many red switches out currently as pressing 2 keys when trying to press 1 occurs in many cases.

Final Thoughts:

Overall, the Quickfire TK from cooler master gets a 9/10 from us. For the price you can get this keyboard for now, it offers some of the best functionality which can even compete with high-end keyboard from corsair or even Razer.
The Cherry MX switches on the keyboard also provide some of the best feedback out of all the switches we have used before and unlike some switches, doesn't cause any fatigue after using it for long.
The keyboard is also sturdy, with metal plates and a hard plastic shell not allowing for any flex on the plastic shell and the metal plates and white backplate not allowing for any switch movement when the keyboard is being used or flexed.
I really recommend this keyboard for users who want all the functionalities of a normal keyboard, minus the RGB lighting and who want it in a good chasis with good switches.