The list of advantages and disadvantages is as under: 

Advantages: 

• Simplicity was the most important characteristic of this system. 
• Simple and tailor-made administrative system is the contribution of this system. 
• Guarantee of human protection was evident in this system. 
• The lords or the nobles were dependent on the vassals for military service. As a result, the ruling party could not become autocratic. 
• The economic system also saw notable progressive changes.
• The savagery of the barbaric communities was controlled. Man became aware of his duties and fundamental rights. 
• This system encouraged literature. 
• The special contribution of this system was creation of rules and regulations.

The nobles got their training through these rules and regulations. This training enabled the nobles to protect women, the weak and the Christian religion.

Disadvantages :

• With the influence of this system, a class of aristocracy came into being. 
• Arguments and disagreements began among the aristocrats, nobles and vassals. As a result of this crisis, the agreements and arrangements of the feudal system failed. 
• The nobles started competing with the Lords or the kings. 
• Many became traitors and posed a threat to their own regional unity. 
• The judicial system also was full of weaknesses and there was no rule of law. 
• The church and the state were at loggerheads with each other.