First off, I've been thru the Rikaline 6010, Navsync, Delorme and BU-303. If I put the reciever inside my car...no signal at all. Once I put it outside, I was recieving anywhere from 3-5 sats. But sometimes none at all. I tried the bu355 ( for hibernation purposes ) and my gps hasn't dropped since. Actually, only if I go into a tunnel. Locks in 2 seconds and I always have from 7-11 sats. I highly recommend the 353 or 355. If anyone wants to try their luck...I have two used Rikaline 6010's and one DeLorme receiver.
btw..my car is tinted and it's mounted on my dash.