for the 2 month that it work , it be better than other minus keyboard\/trackball combo that I have try -lrb- but that be not say much at all , since they be almost all terrible -rrb- . one thing I like most about this over other be that it rarely need to be resynch . the trackball work pretty well for be so tiny , and the mouse buttons\/scroll wheel be nice . but today , after use the keyboard for probably only 5-15 minute per week over the last couple of month , it have go haywire . press most key on the keyboard now result in the keyboard send multiple keystroke to the computer . for example , the `` g '' key send `` gv '' . I be past the Amazon 30-day guarantee , so I 'll have to try to deal with the manufacturer Adesso .