Magento is a great system with semi-automatic modular and core upgrades. However, each store is unique, with its unique requirements of customizations, designs, themes, third party modules, etc. It is therefore recommended that the up-gradation process be controlled by certified Magento developer. Continuous up-gradation brings a number of benefits to your website. Not only does it provide a better speed and code optimization, but also ensures bug fixes, stability, security patches in addition to new features and improvements. This step eliminates the risk of things going wrong during the process. Also, this ensures the entire process is carried out in the right manner, such that the website will not face any future issues as well.
You can read more about Magento Upgrade Service at- http://www.softprodigy.com/