They should work great!
Here's some EXTREMELY rough and hard-coded example code for sending serial to one of those modules from the Android side. I just happened to be working on that exact thing tonight!
private static final UUID SPP_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); // Very important - has to be this for SPP to work
BluetoothAdapter mBluetoothAdapter = null;
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
String address = "00:12:03:27:50:44"; // Hard-coded to match my module - you'll probably want to actually be able to select a module from a list
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
String message = "Thing To Send";
byte[] send = message.getBytes();
BluetoothSocket btSocket = null;
OutputStream btOutputStream = null;
try {
btSocket = device.createInsecureRfcommSocketToServiceRecord(SPP_UUID);
btSocket.connect();
btOutputStream = btSocket.getOutputStream();
btOutputStream.write(send);
btSocket.close();
}
catch (IOException e) {
e.printStackTrace();
}