Pros: not running out of power for sure.

Cons: none that know of.

Overall Review: This is ALL the power I need for my use, and some.

Pros: UPDATE: WOW, what a comfy mouse! More then 10 days using it. I DO FEEL a difference in "fatigue" in my arm. NONE !!! Still checking on the battery life.... still first "box" battery and going strong. "Low Batt" light not on yet ! STBY... more to come... Comfy... then some. "FAST" traveling, many screens. (5) EXTRA FAST delivery ( even reg delivery!) NO MORE mouse moving, no more lift up mouse RE-position, just a fast trackball. 2021-12-27 >>>>>> UPDATE ! ! ! All was written, fully true. NO cons, still. Battery life = Amazing. >>> Over 8 hours a day, battery life, more then 2 months. Can't believe it! as you saw the pic, NEW monitors setup, including now a LG 48". The reason I mention it, look at the massive coverage area ! ! ! that track ball cover ALLLLLL that so fast. THEN, if ye need fine tune, HOLD Shift as you roll and it slow down the speed of the mouse by 1/4. AMAZING !

Cons: None so far. Will let you know later about the battery. (8 hours + /Day.) we'll see. 2021-12-27 >>>>> STILL NO CONS !!!! Batt life amazing.

Overall Review: Kensington Orbit Fusion Wireless Trackball____ make sure you download the software so you can FINE TUNE it ! ! !______ Once you have tried all the set ups, and ye find yours, you will love this mouse for ever. Just don't try one setup. try many so you can really enjoy this product. ( I DO !) >>>>Example: you set it up for very fast track moving, ...AND... use Ctrl key for "SLOW" moving. <<<< This is AMAZING ! I use it for the "Pic" setup... WAY WAY WAY better than the mouse you see on the pic. I use "Fast" trackball so I can travel from all them screens. For me... it became a "PLUS" for all its features. ( I am NOT a gamer, study/writing/research.) Give it a try... it worth it. ( PLUS... MORE expensive everywhere else.) I RECOMMEND THIS PRODUCT. 2021-12-27 >>>>>> STILL recommend it !

Pros: speed is the pros. That is so different from regular HD

Cons: didn't see any yet...

Overall Review: My first experience with SSDs... WOW!

As described, all good, item, order, delivery . . . A1+

NOT delivered yet. NO tracking available from UPS. Some how, disappointing.