Kirby is known as the most well-built and most reliable as its parts are metal and it can be used for more hours with more demanding tasks without wearing out or having to stop. Kirby is also known for being very durable and being able to take a bash or two without breaking. Therefore, some users prefer to keep their Kirbys from years ago, as they have nothing wrong with them and can keep going.
New Kirby models have a system to combat the weight that can make the machine difficult to use. Techdrive is used to power the wheels of the machine in whichever direction the user wishes. TechDrive is an innovative system exclusive to Kirby. Other Kirby exclusives include the wooden brush roll and the Mini Emptor. The Mini Emptor is a unique device that captures big particles to stop them from piercing the bag.
Having never owned a Kirby myself I cannot vouch for the reliability. However, I know of a family owning them and of them lasting a very long time. My Aunty has had one for over 15 years. This must be a testament to how well built and reliable they are.
Until next time, hoover fanatics!