I have some serious issues with Polaris which I have been unable to correct even with calls to htc. As an example it will not open some Excel files, I get the message that there is "not enough memory to extract the file" which is a 1.5 Meg file, and with PowerPoint files some slides are ok while others are empty of content. I have converted the MS Excel files to "Open Office" and they don't even show up as existing even though they are on the SD card. I don't know if this is a problem with Polaris or with Office 2010 documents. So instead of continuing to fight with Polaris does anyone have some advice on what other app I could use that would actually open and allow me to work with my "office" files? Thanks.