Never had a mosin nagant.
Fun as they come and cheap to shoot. The triggers are normally long, creepy, and hard, but there are some easy fixes. It wasn't that the trigger was a bad design, it's that they went through a refurb process in which they slapped on new parts and weren't too worried about precision fit since they were going into storage for World War Three. People who have guns that weren't refurbed say they have smooth, crisp triggers.
The safety takes a little while to get used to, but there is a trick to using it.
A Finnish version, say an M39, will shoot like a target rifle and have a very nice trigger. The Russian guns tend to be more hit and miss since they were slapping parts together.