While I'm not everybody, I think its decent and better than the default which is your ISP. Normally pointing directly at google or cloudflare does not hide it from your ISP. I actually just did this yesterday though not with a raspberry pi since I just care about my windows box for now and my router is not open enough to allow this. I think they recommend doing it on your router directly if possible. This helps with Android devices for instance which do not really let you set your DNS easily. I installed DNSCrypt for windows on my desktop and pointed at cloudflare. As others pointed out without a VPN, its only kinda helpful but I figure I don't need to share any more than I really need to with my ISP who I don't trust in general. Also I figure even with VPN anything that slips past the VPN for whatever reason is leaked less to my ISP.

Had an extra benefit of creating a log file of queries so I can see addresses that are being queried. I found NordVPN pinging random websites and wondering why? (To see if I'm blocked apparently)