ORDERED = 07/26/2016 || SELLER = Amazon.com LLC || PAID = $59.99(Beware of Seller changes! That's when you may get burned!):: PRO ::1.) Replaced a $100.00 Logitech Laser Cordless & it does a better job by far!2.) I like the weight & use most of them, preferring a heavier mouse.3.) I'm about 6'-6" and little over 200 lbs - this thing fits my giant hands fairly well ;)4.) Lights are cool & people will like it, but for me I use them to visually see the mode I'm in.5.) Fully customizable RGB LED, you can set color, cycle speed & mode indicators.6.) SUPER accurate, it is better then my Laser and I find that surprising.:: CONS ::1.) The cord hangs up until you get it 'use to' your desktop setup.2.) Really miss the cordless days, but this mouse catches every signal & the slightest movements.3.) The RGB is usually not prominent as it's under your hand or in sleep mode.:: OVERALL :: I HATE CORDS, but I love this mouse so I am torn. I need to be highly accurate in my video, photography & gaming life, the Proteus Spectrum enhanced all my computer work & play! I have bought 2 of them now & dropped them both several times hard....they still work perfectly and remain accurate. Seriously this mouse brought my K/D up to new highs, it's so much better then the cordless laser I am still kind of in shock. It's a gaming AND business must have. Using this for websites, photo editing & detail alignments in Adobe is a dream come true.DON'T FORGET IT's EVEN GOT MACROS!?!? I don't use them to their full potential, but the few macros I have are awesome!