Hello all,
I think USB is good for debugging and it also has enough speed, one advantage is that you can send AT commands as well through USB port.
Regading the USB restart issue. If the module restarts the windows gives a new handle for the device. But in case of a hyperterminal a simple close/reopen sequence is enough for proper working. The Selima and TMT is said to be to detect if the USB device is reconnected so it will able to communicate with device without intervention. Anyway, you can easily hear the USB reconnection because ot the sound produced by windows USB connect/reconnect event.
At least this is the case with the latest USB driver and the firmware 7.3, 7.3a. I have no experince about USB with previous firmwares.
BR
tom