Well after the first one turned up totally destroyed by the useless courier company. I am pleased to say a replacement was sent out straight away (excellent customer service).
The mouse is great to use, responsive, small in the palm of my hand so ideal for a laptop / netbook if you like me are always on the move. It's accurate and comfortable. Plug and play works straight from the off. The added bonus of an on/off button to save battery power works well. The USB antenna can be stored in the mouse itself. But I keep mine in the laptop USB all the time, its so small it does not get in the way or snag in my backpack.