Simple instruction formats:

RISC uses simple instruction formats. Usually only one or a few instruction formats are used. In these machines instruction length is fixed and aligned on word boundaries. Additionally the field locations can also be fixed.  Such an instruction format has a number of advantages. With opcode decoding, fixed fields and register operand accessing can take place in parallel. This kind of design has many benefits. These are: 

• It makes simpler the control unit
• Simple fetching as memory words of equal size are to be fetched
• Instructions aren't across page boundaries.

So RISC is possibly a very strong architecture. It has high performance potential and can support VLSI implementation.