I have one and it isn't the greatest, but it will work at 100 yards. The eye relief isn't great and the optics make the target pretty small when fully zoomed. It was a gift but based on my experience I would not recommend one. Hopefully your experience is different.
I have had one for two years, at maximum power, it is acceptable in sharpness, at lower it is better. 100 yd, on a day without mirage, I can see .22 cal holes at 200 yds.
The scope is a good value for the money. It is not an expensive european masterpiece but it does a decent job.