We opted for the whisper technology upgrade. It’s very easy to install- my husband had ours installed & set up & running in less than 20 minutes. It is SO quiet- husband says it’s bad because he can now hear the rain on the unit- it’s fine he is NOT a light sleeper! And COLD! We thought our old one was cold… but apparently not so much! Our previous unit was 17 years old and ran fine until we bragged on it- then POOF it stopped working. Things have definitely changed in 17 years! We are still in our first week of ownership, but we like it, and the app is sweet!!