My biggest problem with those dongles is not losing them, but having them break off the connector they connect to. This can happen with regular 3.5mm headphone connectors, but can be mostly alleviated with low-profile/right angle connectors. Add a dongle to this and suddenly the overall length of the device in your pocket is that much more, and you put pressure on the connector. I've broken two 2.5mm Treo audio jacks this way, and both times, I was sure that if it was a regular 3.5mm jack, it would have been fine.