Using a Mio Link with Garmin 500. Have not had a single signal drop or data loss, not once, since I started using it. Pairs immediately with the Garmin, the second I push the power on the Mio, I hear the pairing chime from the Garmin. There is absolutely no chance I could wear a chest strap. I can't normally wear rings or watches-- hell, I can barely handle shirts with sleeves. I do also wear mine on the inside of the left arm, with the strap tight enough not to slip-- meaning I have the imprint of the monitor on my forearm for about 30 minutes after I get off the bike.