I`ve had my X a few months now...no way I would take a different phone that Verizon has right now...hands down the X is the Phone for me!
Now, the only cons I can come up with, are going to be for other people...such as:
1) The Droid X is a large phone...it has a 4.3" screen...and that means it is a handful.
2) There is no physical keyboard...some people have never used a full touch screen phone, so it does take awhile to get used to it.
3) That big sexy 4.3" screen...even though it has a tough "gorilla glass" screen, it still can be damaged if it is being jostled around in a purse or a backpack.