I have one and it's decent, mine is the 15 x 50 you will likely have a hard time trying to spot holes in paper @ 200, but if you’re looking for hit/miss (dust) and corrections then it will work well for that.
you'll find that holding it steady is a challenge though with the 15x
the case it come with is crap though, the glass is middle of the road.
all in all it works well for what I want it for.