Someone actually got this for me for me for Christmas because they know that I like to have fidget toys at my computer to play with while I'm working. I opened one pod and started playing with it, and it was pretty good.
After first opening it, it's kind of tough but easy to break into. However, I found that after just a few days, the foam balls start to shrink and it becomes much smaller than before. The balls also fall out constantly and it can make a big mess. Since there's very little actual slime in it, the balls dry up quickly and it becomes really grimy and not fun to play with. I started mixing pairs of foam pods together to keep the size and I opened a new pod about once a week.
Overall, it's pretty good for playing with while it's fresh. Just don't expect it to last very long.