I purchased my land air and sea because my husband is getting onset dementia… He is still functioning but has a period or so when he forgets.. It helped me to locate him one cold day he drove to a store and just sat there for over a hour not remembering how to get back home. I was able to get to him and my daughter drove my car and I directed my husband home . It’s definitely life saving and gives me a peace of mind it’s reliable and I like the energy saving mode and it’s ease of use. A phenomenal product