Zoho email free plan, pros and cons

[Curinom]

Hello,

so far i understand that the free plan allows you to have a custom domain email and a max of 5 emails.

the cons as i understood do not allow IMAP/ POP/ Active Sync, i understand that these are used to use the email in gmail or any other email app, so i'd have to use the zoho app, no problem here, so what are the cons? i don't see this as issue, what am i not seeing?

[Curinom]

How would email forwarding help me? what would i need it for?