I've had the explorer since it came out. I'm never without it when traveling, camping, hiking, off road motorcycling and cruising. It's been around south america, cuba, all over the west coast and I've never had an issue sending or recieving messages, contacting people, sharing location, or mapping.
it or the SE+ is IMHO a valuable tool if your often in locations where emergency contacts, or extraction may be important it's well worth the $$.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!