Just wanted to add my 2 cents worth--KVS has been very nice to me in responding to numerous PM's 'cause my office would not let me load the program onto my corporate laptop. But in speaking to others who have used it, and suffered from not being able to have the tool myself, I can say it is a great thing for all frequent fliers to have. Just having the ability to check award and upgrade avail. is an incredible advantage--and soooo much better than trying to hang on hold for a live agent--esp. if you are using a *A award. And KVS only asks for a donation of $30 towards the work he has put in for the upgraded version. There is another site out there called expertflyer.com that charges $99 up front and does not have nearly the power---or ability-- to see hidden fare buckets--as KVS.