It’s up to you.
The Representative is the only person who is allowed to receive information during the application process if you appoint one.
If you don’t appoint one, both the principal applicant and sponsor receive emails during the application process.
We didn’t have representation. So we have access to everything, think it’s better to not have a representative as long as both the sponsor and principal applicants are regularly checking their emails and the CIC ONLINE TOOL (ECAS) and GCKEY.