So far I have used this in 4 property locations and only had one station where I witnessed active bites of these red bloxs. They smell good and feels softer than the purple Fastrac blox. But I have not have the same success as I had with the Fastrac. Mice not seem to be interested in them. I bought a giant bucket so I will keep using them for a while. The results are no where near what the other reviews are like.