Allow all Authenticated Users Credentials to be cashed on all RODCs?

Dears,

I have around 500 users distributed in 6 branches, these users are roaming users and they use those 6 sites, I have 6 RODCs, one RODC per branch site, I want to Allow all Authenticated Users Credentials to be cashed on all RODCs, is this good approach and design?

Thanks

Regards