I like the concept very much and found it easy to make the pots following the instructions. However, the pots are very unstable and so I ended up putting them in other containers to stop them falling all over the place. The small size of the potter means that they are very light and easily knocked over, especially if they become unwrapped at the bottom. Also the pots dry out quite quickly (which makes them unwrap) and I suppose there is also less weight to keep everything in place.
I made better and more rigid pots by using more newspaper.
When I repotted the seedlings, I had better results by unfolding the newspaper pots which was easy. I hoped to avoid disturbing the roots of a couple of plants and so I put the paper pots directly into the ground. To my surprise, the newspaper didn't break down at all (the Guardian - well, what did you expect?) and the top of the newspaper pot formed a sort of "collar" around the seedlings which meant that they didn't get much water (and died).
I think this product would work better for people with a lot of space to grow seedlings and to water them. A lot of my irritations came about because my space is quite confined and so if I misjudged the water pressure or moved something, all the pots would fall over.