This thing works just as advertised. So far I have used this on Windows XP, Mac OS 10.4 and 10.5 without any problems. The USB connection is very handy since you can connect to virtually any computer made in recent years. Installing the software was a breeze, but I did noticed software updates will come out often and not always be detected, so I would recommend visiting [...] to get the lastest version.Speeds with Rev A. are noticeably faster than the older Verizon Broadband card. I'm in the South Florida region and have not found a spot where Rev. A is not available. The monthly fee is definitely worth the freedom of having fast internet connection virtually anywhere.