If you've got your modern eyes on, it's going to leave you wanting, if you've got your rosy safety goggles, then it's cool, and the last of the great milsurp snipers that the average guy can afford.
I've shot both a refurb and a repro and at the range that I can make use of a 3x optic I see no real diff. My refurb is the nicer gun, though, and I'm not even certain that the repro isn't a bog standard rifle that has been scoped, since there's no original serial number on the receiver for the scope and the bolt body has tool marks.
I'd say go for the real thing. Repros will never be worth a great deal and if you don't like the original scope, take it off and buy the new made one to use and keep the old one safe.
I got my rifle from Weimajack several months back. Excellent condition.
Pitfalls.... Not much I can think of. Get on to one of the mosin sites and learn how to properly adjust the scope and mount. The reticle does not stay in the center of the glass, so if its way off to the side or top or bottom when youve sited it in then you need to adjust the mount to compensate. Elevation is easy - just a couple set screws. Windage requires filing or shimming. Neither rifle that I shot required windage adjustments, however.
Otherwise it's a 91/30, picked out of the production run for having the potential for above average accuracy, and has a basic scope. If you're the sort who wants only one mosin, and you don't just want a noisemaker to blast surplus ammo through, then it's probably the one to get.
....actually, that was my attitude at first. Several months later I have 9 or 10 mosin nagants.....