Cruising with the bottom category - "Category Z". Is it worth it?

We're planning our first cruise, and frankly don't plan to spend a lot of time in our room (our spendthrift friends are reserving a suite). Royal Caribbean has a Category Z (or Y) that is about $400 cheaper than other rooms because the room assignment isn't guaranteed.

Anyone ever travel this way? What sort of room did you end up with? Do they automatically give you the worst ones or the "best available"? We're cruising in April, so doubt the ship will be full.

If you are not worried about where your room will be
then this is the best way to save money.
Chances are you will get the best room available in that catagory or
if your lucky,you will get moved up several catagories.
We have sailed Royal Caribbean many times and are Diamond members.
In the past,we have booked a "ocean view" and when it came cruise time
we were put in a "Balcony Suite",which is 2x the price of a "balcony" room
They are in the business to have repeat cruiser's,so they will give you
close to the best available,within reason.
So if this is your 1st time with Royal Caribbean,
then you might have a greater chance of being moved up as we were.
Now if you prefer your room to be near your friends,
then you would need to have a "set" room number
Good Luck