I just got off a 5 day cruise in the Dream. The price is discounted if you take the package for the entire cruise. See below. I added the basic while I was in Fort Lauderdale port before boarding. I was just charged $120 for the basic plan which was supposed to include internet calling but for some reason I could not get calling to work. I was able to face time call but not straight internet calling. In my case I think it is a Verizon issue because I could not do internet calling after I returned home from the cruise. So from my experience if you are considering getting the package check with your cell phone provider before cruising to make sure your internet calling works. Price is for each phone so only my phone had the internet package. Both my phone and my wife's phone have each other's email accounts on them so we were able to check emails for both our accounts.
This is from planDisney website:
• The Stay Connected package lets you keep up with your social media, including posting photos. Currently, this package is $18 per day for one day or $16 per day if purchased for your entire voyage.
• The Basic Surf package has the additional benefit of checking email, internet access, and voice calls. Currently, this package is $28 per day for one day or $24 per day if purchased for your entire voyage.
• The Premium Surf package offers all of the above with faster connection speeds, streaming for short videos and music, plus video calling. Please note that you cannot stream from services such as Netflix and Hulu. Currently, this package is $42 per day for one day or $34 per day if purchased for your entire voyage.