Hello! We use Isensix and have been mostly pleased with it. It is wireless, very user friendly and has excellent data backup function. We previously used the REES and decided to replace it with Isensix after a system crash where we lost quite a bit of data. That was an older version of REES though. I also liked the flexibility of Isensix versus REES. Since it is wireless you can move equipment around without much headache. My only complaint about Isensix is the slow response of customer service....but, I experienced that with REES as well. Hope that helps!