I really do like this seat cover.  That is, I like sitting on it.  Everything else about it is kind of a hassle.

PROS (Or "the pro," really, because there's only one): It's comfortable.  I wouldn't say it's like riding on air, but it does make my bike saddle about 50% more comfortable and my sit bones about 50% happier.

CONS:

1.  As other reviewers have noted, it tends to slip to the side, no matter how tight you pull the drawstring.  I eventually solved the problem by attaching it to my saddle with double-sided duct tape, but that solution only works if you want to leave your seat cover on all the time.

2.  The seam frays and the fabric runs easily.  Mine started to pull apart along the seam after only a couple of uses.  I held it together for a while by painting the seam and the runs with clear fingernail polish, but after a few months the seam gave way anyway and I had to resort to duct tape.

3.  When it gets wet, it takes hours to dry, and in the meantime, riding around on a wet seat is distinctly unpleasant.  Since my bike stays outside nearly all the time, I've started carrying a plastic grocery bag in my backpack and tying it over the seat whenever it looks the slightest bit like rain, but I've had a few wet rides all the same.

So, bottom line (no pun intended): if you're looking for an easy, relatively cheap way to make your bike more comfortable, this seat pad will work, but you have to be prepared to put up with its flaws.  If you don't want the extra hassle, you'll probably be happier if you spend a little more and get a whole new bike saddle.
I really do like this seat cover. That is, I like sitting on it. Everything else about it is kind of a hassle. PROS (Or "the pro," really, because there's only one): It's comfortable. I wouldn't say it's like riding on air, but it does make my bike saddle about 50% more comfortable and my sit bones about 50% happier. CONS:

1. As other reviewers have noted, it tends to slip to the side, no matter how tight you pull the drawstring. I eventually solved the problem by attaching it to my saddle with double-sided duct tape, but that solution only works if you want to leave your seat cover on all the time. 2. The seam frays and the fabric runs easily. Mine started to pull apart along the seam after only a couple of uses. I held it together for a while by painting the seam and the runs with clear fingernail polish, but after a few months the seam gave way anyway and I had to resort to duct tape. 3. When it gets wet, it takes hours to dry, and in the meantime, riding around on a wet seat is distinctly unpleasant. Since my bike stays outside nearly all the time, I've started carrying a plastic grocery bag in my backpack and tying it over the seat whenever it looks the slightest bit like rain, but I've had a few wet rides all the same. So, bottom line (no pun intended): if you're looking for an easy, relatively cheap way to make your bike more comfortable, this seat pad will work, but you have to be prepared to put up with its flaws. If you don't want the extra hassle, you'll probably be happier if you spend a little more and get a whole new bike saddle.