TanDEM-X Launched

Recently the TanDEM-X satellites were launched which is basically a pair of srtm style satellites which will map the earth constantly with radar...Looking forward to seeing basically srtm data at about 5-15m horizontal spacing being available in future...Hopefully with a full time SRTM style pair of satellites up there high res terrain for the whole earth will one day be available...Only thing is, I wonder how much their pricing will be once the data starts flowing through, how processed will the data be, how many holes and voids? Being that it's twin satellites I believe they have said a lot of the voids can be eliminated, so we'll see what happens in coming years...I know I'm excited about the possibility though...