Seems to have got very erratic recently. Sometimes fine but at others very slow. All arrives eventually but bit of a pain at times. Typing messages can be very difficult as I don't know how much is me or my computer and how much BT. A time lag sometimes happens between hitting the key and the type appearing on the screen, and letters get missed out when I think I have typed them. I am far from a perfect typist but not that bad; at random times ;-) The cursor also sometimes returns to the LHS if I pause to think and I don't always notice.
