First! One has to love Amazon for locating best price on items as keeps Vendors competitive.  If there is issue (Luckily only one bad issue with a product) Amazon was right there w. me to insure I was satified w. return and refund.) ..OK!  On computer 6 to 8 hours a day.  Working loans and that means numbers w. no room for error.  Do not like internal mouse.  Still use external port mouse and pad.  I can go all day.  And let's talk about the Belkin mouse I ordered.  Talk about glide and right on point, they don't come any better.  They even make a mini-mouse that works as well as norm. size.  Little trick I learned as this is gel.  I put in refrig. overnight.  Take out when ready to start work.  Surprising how long it remains cool as heat radiates from both my laptop and desktop.  Secret must be in high-quality gel.  It says to wipe down to clean but I've hand washed mine and all stayed as good as day one.  Wonder if they make a cooling fan for laptops.  Gone through 3.  Work for a few months and conk out.  Off to check.