It seems nearly everyone loves them, but is one better than the other or pros or cons?

Pro's for me:
*Leaves floors dry (I have all hardwood..that was important)
*Lightest weight - it would seem that a unit that weighs about 5 pounds would not be all that much different to operate than one that weighs 3, but believe me, it makes a big difference.
*Pulsing steam: superior to continuous steam because it lets you use more or less in different areas, and you can also leave the mop to do something else for a minute without running out your water, and cooking your floor.
*Easy pad use: Having to tie on, clamp on, or pin on your cleaning pads doesn't seem like a big deal, but it gets old really fast. You can throw the Shark pads on the floor, put the mop on top of it and be ready to go. In fact, I sometimes don't even use a formed pad for quickie cleanups...I just throw a microfiber cloth on the floor, and the grippers on the bottom of the mophead grab right on to it.

Con's:
*Cord could be longer. It's longer than other models (21 feet) but it would be nice to have a little more range.
*They really ought to give you a dozen pads with the mop. If you don't want to be making a bunch of your own, by all means, buy the extras. You'll be glad you did.
*Stupid fill hole. You almost have to have a funnel to fill the chamber, the fill hole is so tiny. Seems dumb to me to have to have both a measuring cup AND a funnel everytime you need to refill.

As you can see, the cons are easily remedied or not really important. On the whole, it's a great product and performs well.

Thanks