Actually my transfer (3 GB Music) was relatively fast though I don't doubt what you're experiencing. No idea on dropped connections, etc. Try a different cable, different USB connection on your PC. Just a thought.
The hardware is impressive and has great promise. Agree the software (Android, Launder) isn't quite as refined. I'm currently dealing with the Swiftkeyboard randomly closing the keyboard when I need to use it or being totally unresponsive. I've found
simply "restarting" the duo cures it at least for a few uses. If you haven't rebooted your Duo in a while, can't hurt trying. Beats a complete reset.