Positives
=================
very reliable
when a seal or (rarely) a part goes, very easy to repair yourself
good shot count
good accuracy
robust (if it gets bashed in the field)
options to enhance (regs, longer barrels, shrouds, QF adapters) to compete with more modern guns
good support knowledge
nice weight / balance
good FAC options
easy to change calibres/barrels

Downsides
=====================
So-so trigger (but with minimal fettling, they are fine)
some recoil
slightly lumpy bolt action


In summary, the positives massively outweigh the negatives.