It takes a couple steps to get to 18 POV. I say this because when you first sign in, the banner at the top of the page is for the POV site, but the collection in front of you is from the Videos Z website. To get to the main content, you need to find this site's link on the left-hand side of the page, which will filter all the content for you.
I can tell you right away that there are more than 18 point-of-view scenes on this site and not all of them feature 18-year-olds. So while the sitename might seem a tad misleading, I will say that the collection is all shot in the POV style and the babes, for the most part, are of the coed variety (so they're not that far off from their 18th birthday).
Actually, given that there are over 14,000 DVDs worth of content on the mega movie site and only 172 videos on 18POV, I highly doubt it is "all of them." I was also surprised given that fact that the POV site hasn't updated in the last two years (although the collection has been shuffled around, with them putting the vids in a different order).
As for what is available, the movies all come with the option to both stream and download them and they offer average-quality bit rates. You can also check out all the other scenes from the DVD, see other scenes with the same model (obviously not just POV) and save a scene to "your collection," which is like saving it to a favorites' section.
Remember how I mentioned VideosZ? Well, that is important, because not only is all the material here taken from that huge video site, but it also means that you get access to that entire movie archive and all the films therein. Which is a huge selling point - and not only because there are thousands more POV scenes to be found there.
When taking all you have access to into account this is a pretty easy-to-recommend membership. But obviously there is no need to join 18 POV should you already have a membership to Videos Z.