Bluetooth connection seems stable. Not sure I will pay $120 again but I could use these in several colors because they are a simple ballet flat. Logitech really have lost the plot. People always seem to talk about weight, but I think it is light enough and I honestly dont feel the difference in weight between the different mice when I am using it normally or for gaming. These are great - $25 price range. was as bad as they suggested. They disconnect in about 30 seconds after you stop listening to anything. Das Handy wird in der Halterung bombenfest gehalten, Erschütterungen beim Fahren übertragen sich nicht. However they are lighter and thinner than I expected. Ya van varias veces que pido estos zapatos para mis hijos y no me llegan en las tallas que los solicito.