nothing I would call 'problems'. if I haven't used it in a while it will sometimes take a few extra seconds to lock, especially if I'm in a new place, but that's just the nature of GPS. the Google maps blue arrow usually snaps into place (at least getting me on the right road) within 5 secs or so. what issues are you seeing? keep in mind that you will need to spend up to 2mins calibrating GPS anytime you relocate (it takes longer if you move further away). For example, I had to open my GPS app and let it calibrate for a minute or so after moving from UT to OR, and then back again.