Matthew Parkwrote a review of Ortovox S1+ Avalanche Scanner/Transceiver on March 31, 2017
Familiarity: I've put it through the wringer
Like a good friend this beacon is there for you when you need it to be. I used this all season and while teaching avalanche courses and was very impressed with the features and functions of this beacon. If you are a guide the group check and signal analyzation is super nice. If there are multiple rescuers with the S1+ you can really cut down on locating multiple victims. The search function displays and sounds are super intuitive to follow and help you pin point the victim faster. Basically if you spend a lot of time in avalanche terrain you should have this beacon.
Disclaimer: I am a member of the Ortovox North America pro team and while I try to write non bias reviews I'm sure some bias makes its way in.