I have made the move and I'm satisfied.
I save ~$17/month over what I used to pay. Currently it's my wife and I on a shared 2GB plan. I've only completed two billing cycles as of today. We've used 1GB combined the first month and closed out this month around 1.5GB combined (simply because we streamed Pandora on a 4+ hour car ride and still had a ton leftover so I streamed some videos and did a bunch of random speedtests on 4G at random locations just for kicks).
To successfully make the switch, you have to first determine two points of data:
1. Your overall average data use combined (i.e. everyone on your plan who will be pulling from the shared data pool)
2. The MAXIMUM amount of data ever used (again, combined) and I suppose how frequent you come close to that maximum. For me, I have been keeping a spreadsheet with a graph since I got a smartphone so this data was easy for me to come up with. If you don't have these numbers, Verizon should be able to help you determine these things.
The next thing you'll want to do, armed with your average data use and the maximum that you and your family has ever used, is compare pricing. This gets tricky because you have to understand that Verizon will subsidize $400 of your phone if you jump to the shared plan -- but will not if you choose to keep unlimited and go month-to-month. You'll need to do these calculations on your own and determine if it's worthwhile to jump to the tiered/shared data plan or not. Just keep in mind that if you go subsidized, you're (in a way) "saving" about $18-20/month versus buying the phone outright. Looking at it another way, if you were to purchase the phone at full price, you would essentially be paying an extra $18-20/month MORE (but you're paying it upfront) to retain unlimited data.
We carried unlimited data from 2010 through 2012. I was actually hoping to keep it which is why I paid for it even though I knew I wasn't utilizing it. Bummer.
In that timeframe, we used an average of 0.6GB combined with a maximum of 1.8GB combined. We never held back on anything we wanted to do with our phones (using google nav as needed, streaming pandora as desired, emails, occasional youtube vids, etc).
To me, that was a no-brainer. I sign up for a 2GB plan, keep doing EXACTLY what I've been doing, and save money. If we DO have a month where we need more, I think they just automatically charge you $15 and give you an extra gig. If this happens a few times, I can bump our data plan up to 4GB/month for an extra $7 including discounts.
Other members will tell you to take a bullet to retain unlimited data. I've asked many many times and have rarely gotten a solid reason why it's beneficial to retain unlimited data... mostly, people are just planning for a future that has yet to unfold... just like what I was doing by keeping unlimited data for the past 2 years... all for nothing really.
I'd be glad to help out and chime back in if you gather some numbers/other info:
1. Total average data consumed for everyone on your plan
2. Maximum data consumed by everyone on your plan (historcially)
3. What you currently pay.
4. If you are eligible for any discounts.
5. What your typical useage habits are.
You have to quote my post if you reply though or I won't see it in my notifications and it'll be lost forever!
----------
$450 is quite a bit of money. Have you run the numbers to see how much data you use on average (and maximum) to see if it would be better for you to retain unlimited and pay the extra $450 or jump to a tiered/shared plan?
some people cite that they use 8-10 GB per month!!!
For these kinds of people, it is likely not worth making the move... but nobody can really give a good reason as to why the use that much per month... or their reasons are just silly.
It does bring up a good point though. A (somewhat) phenomenon that I've observed is that there are enormous amounts of people who either don't know what uses data, what the difference is between wifi and 3G/4G or simply don't care. I think if some people would just review their data consumption habits and jump on your company wifi if you *have* to download the latest lady gaga album or use your home internet when you're home (duh), a lot of them would reduce their celluar data use (3G/4G) which would save them money, put less strain on the carrier network, and win-win for everyone.
----------
Probably should have prefaced everything by saying that if you're on an individual plan, chances are it's not going to be worth making the move. I've yet to find a scenario where it is worth it for the individual. 2+ people on the plan, time to do some math!