They stink for low light, you have to be extra steady when trying to look at something but they are excellent foe spotting the 10 ring on a 3-D target. Of course though, there to high power for IBO.
If your eyes are good they are fine. I used a pair in GA. for a few years and they worked fine. Searching bean fields in Missouri was a little more than they could offer so I got some Monarchs.