So basically i ordered a G903. Arrived with no seal and damaged! Requested a new one. Was waiting for about a month. Then received my replacement and it was the older G903 model with the PWM sensor. Waited another 10 days and i had to email them again just for them to reply back that i have to send the wrong replacement back so they can send me the new one. They just replied: You will ""soon"" receive a UPS e-label to send the wrong replacement back so we can issue a new one. Of course i didn't accept that and asked for a full refund. Since the mistake is theirs i won't leave my job so i can find boxes just to send the wrong replacement back. Is been 5 days am still waiting for an answer. P.S Am still waiting also for the e-label email. Worst support by far! Never buying Logitech products again!