I live in BC.....mountains and trees....sat reception is less than stellar. Vehicles of various brands cut out a lot......a borrowed from a buddy that lives on the prairies and loves it, 665 also cut out too often. And......no deal for multiple units.....no sat for me!
I don't have Sirius on the bike because of the trees. We have canopy roads where the trees make the road into a tunnel of sorts, Sirius reception there is lousy, lots of skips & drops. Here is the Buggy Jungle what they call a "hill" is usually not much of a hill, so satellite does work well in the open areas. The Spousal Unit likes the Elvis channel. Have it in the car & truck & for the bike I use MP3s. Mountain areas are tough on reception no doubt.