I had almost given up hope of replacing my mouse I had previously used this logitech sometime ago…and as with many things we fall in love with nobody seemed to stock this particular one anymore…Wow I was so excited to find it…the trackball might take a bit of getting used to but for me I LOVE IT.....Great on my wrists and hands…I used to play a lot of pc games and do a lot mouse-work and the trackball for me is brilliant…Even my hubby was wrapped to see I had again found our mouse…My ten year old son loves it…Give it a go…I cannot recommend it enough…Thanks Mighty Ape…