There are pros and cons with having the convenience pkg.

As stated in the OP, you can roll them down remotely before entering on a hot day however there are peoe on here who keeps the key fob in their pockets and has accidentally rolled down the windows during a down pour without them knowing.
Keep in mind that you can roll the windows up or down by simply removing the key from the key fob and inserting.

Turn the key either to the left or right and voila. I forget which way makes them go up or down though.
The company that makes the modules is called KP Technologies and they have modules for the window and sunroof. Their prices are quite high and honestly not worth it to me and makes someone do those things manually.