I purchased a Tom-tom Via 1535 TM GPS from Best Buy for $249 plus sales taxes. I love the GPS, so when I finally getting around to attaching it with the computer to take advantage of the Lifetime Maps offer which was part of the purchase price, I am unable to. I download the version of Mac software and I have no option available to input my maps code to download the latest maps. I also can't download the latest traffic camera database, nor can I back up the data on the unit. All I was able to do was load a POI file, but can't manipulate the results via the computer, I have to do it on the GPS. I'm also not able to buy the voice packs, because you have to load them through the software, which doesn't offer that functionality. I purchased this model because of the features which was advertised, particularly the customized maps function, as well as the lifetime traffic and maps. I called TomTom and their CSR didn't have any information, nor did he offer to ensure it's escalated beyond opening and closing the ticket. I contacted them by email, and also didn't get any answers. AVOID TOMTOM and definitely the VIA series GPS units.