I used them last cycle and they work pretty good. I used them with the Answer ones. I saw only one + with the IC but had a lot of positive days (like I always do) with the Answer ones. I sometimes see 7 or more days of +'s with the Answer ones.
Not sure if that helps or not

I guess what I am trying to say is the IC's work but don't seem to be as sensetive as Answer. Not a big deal though because they do detect the surge and get pretty dark when the LH surge is present. It might actually be a better thing. With Answer I am usually pulling my hair out wondering what the heck is going on with my body. The IC lined up with my temps and cervix position/cm.
Now did that help at all???