The current shape of PG master-slave replication

Hello!

I am a happy PostgreSQL user, but I have never tried PG replication at all. 

Based on my vague recollections concerning the past, MySQL used to have 
the advantage of having a pretty stable and working master-slave 
replication when PG did not have such a thing. But PG has been more 
SQL-compliant, has had foreign keys forever, and in general, I guess PG 
has had a more advanced feature set available.

I have followed the progress of PostgreSQL regarding replication just 
occasionally, but not very actively. Master-slave replication is now 
officially supported in the newest releases, maybe has been for a long 
time, I am not sure.

In any case it is not my intention to spark a heated discussion about the 
merits of MySQL/MariaDB vs PostgreSQL. All I am asking is maybe hearing 
some observations of PG admins out there.

To be concrete, if I use PG 10.x master-slave replication in production, 
is it very reliable when set up properly? Any practical experiences? Well, 
I suppose it *must* be reliable, but I am interested in hearing of 
possible problems, too.

Thanks for the information.

Best regards,
Unto Sten