I totally agree with DutchArjo - btw, had murders trying to log into this page, having to create (another!) username in order to be able to do so. To be fair, those difficulties were probably due to the awfulness of the Chrome app (about which I tried to leave a review and encountered the same problems as above and after 3 tries at creating a nickname, gave up). Anyway, the point was that once you've written a review, if you then attempt to select a nickname that is already taken, your whole review disappears, so you have to re-write the whole thing, once you've found a nickname that works. A "nickname" should not be necessary, or you should have the option to set this up independently of writing reviews. I checked my Apple ID using the link from App store, and nowhere does it allow me to set up a "nickname" - just as I wouldn't be able to set up a username for this page, from within my Apple ID. It seems you need a different name/username/nickname for each single different Apple feature. Or the reviewing process should not delete your whole review each time you select a nickname that's already taken. I've tried to leave one on at least 3 separate occasions, and tried more than once on two of those, and each time, had the same problem mentioned above, so this is not an isolated error, but seems to be something happens regularly. Without sorting out a nickname, you can't write a review, basically, but it tells you this nowhere, so new users write their review, then get told they need to select a nickname, and if they try one already taken, they loose their review.