Bought my son one, and he immediately wanted to scope it (we shoot long range), so I can't comment much on the irons.
The rifles are works of incredible quality for the money- like a Swiss watch- and extremely accurate...
As long as there's no issue with the crown or bore, if you aren't hitting with GP-11, it the shooter
If you want to fit an optic to it, St. Marie makes both a d&t and a clamp-on mount.