Why is it important to make the right? 

Garage Door Springs play a significant role in Garage Doors. Garage door springs are widely available but surely one should look for an assured best quality and well-engineered Garage Door springs that feel better from the very first usage of the door after installation.

Certainly Garage Door repair and maintenance frequency could be a pain for someone who has not found the best Garage door spring or the right service expert for the same.

What a Garage door spring actually does?
Garage door spring is engineered to counteract the force of gravity on the door. In fact, this means a garage door spring is supposed to make your door light enough for you to be able to lift it at you operating it at ease on your own, or for the power of the garage door opener to lift it up easily in short.
Why Garage Door Spring quality and installation are important?
Usually Garage Doors weigh around 400lbs. If the install or service engineer does not deal with it as an engineer with perfect calculation it is left with improper functioning or it cannot be operated at all.
One should never try to adjust or reopen a closed Garage door without completely knowing what to do as it could either have no result or terrible damage to the hardware and or to the people near it. Torsion Springs, Cables, Drums, bottom brackets, spring shaft and shaft bearings are very sensitive and should not be touched unless by experts. If done, could injure someone or may cause even death.
While a Garage Door opener fails one can disengage the opener only when in closed position, making sure springs are in good position, and manually attempt to open the Door.
If in doubt, please do not be on your own, but call a service engineer to complete the job to avoid any accident.  
It is highly important to go through user/customer reviews or feedbacks before choosing Garage Door Springs and especially in a City like Surrey and even in other parts of Canada there are plenty of options available in this business but it is advisable to take extra care in choosing the best build quality engineered to work flawless. Also, there are few who design such springs and provide their dedicated service installation and repair service. This is ideal for a reason that the designers of such hardware who not for the business purpose but for the brand loyalty and better knowledge in place provide the services. It also means that they are equipped with dynamic knowledge while specializing in not just engineering but also assembling the hardware to the best as per scientific guidelines.
Unlike regular door springs, Garage door springs especially huge doors of factories, offices, warehouses and parking area are crucial to be dealt with additional care while choosing hardware for them.
Hope this gives enough clarity about your Garage Door.