Frer with curved handle ?false positive?


I have heard lots of bad comments about the frer with curved handle giving false positives, unfortunately the store I went to only sold the flat one in a two pack with a digital and I didnt want to pay that much for just the one reg. test

So my question is do you think this is a true positive?

Sorry if this is the wrong room, I didnt know which one this question fit into best...