I had a 91/59 carbine for a short while. If you want a cheap bolt action rifle, they fit the bill. Other than that, the rifle did nothing for me personally.
This, I actually kind of mentioned this in another thread, but other than the "it's kinda cool to tinker with" factor, it pretty much stays in the safe.
Put it to ya this way, I got mine a year and a half ago and bought 40 rds of ammo at the time of purchase, still have 20 rds left. When I plan my trips to the range Mr. Nagant just never seems to be in the plans.
But they're cheap, so get it and if you like it great, if not no big deal.