A: If you are booking a room in a different part of the world, how do you know you are really getting a quality hotel?

B: Ultimately it comes down to a rating system's guidelines as well as the overall preferences of the guest.


Does the bolded part in the above mean "Finally it (getting a quality hotel) goes back to a rating system's guidelines?" Thanks.
I think it means " At the most basic and important level " 

For example :
All life depends ultimately on ultimately .
Thanks, Youngbuddy.

What about "comes down to?" What does it mean?
Students: Are you brave enough to let our tutors analyse your pronunciation?
Come down to (something
To be able to be explained by a single important point.
It all  comes down to money in the end.

Come down to (somebody)
If something old has come down to you, it has been passed between people over a long period of time until you have it
The text which has come down to us is only a fragment of the original.
Thanks again, YoungBuddy.

Is it right to interpret "It all comes down to money in the end" as "it's all because of money ..." and "money is the only way to solve the problem ...?"
That means money is the single important thing.

I just rememberd the song " Money " for Pink Floyd ... 
"  Money, get away.

   Get a good job with good pay and you're okay ........
   Money, so they say
Is the root of all evil today.  "  Emotion: rock
Teachers: We supply a list of EFL job vacancies
Thanks, YoungBuddy.

Suddenly, another similar phrase comes to mind--boil down to.

Are the following two synonymous?

It all comes down to money in the end.

It all boilds down to money in the end.
AngliholicIt all comes down to money in the end.

It all boilds down to money in the end.
I think so ... 
Boil " sth " down to " sth " : to make something shorter by leaving out the parts that are not important 
The original speech I had written got boiled down to ten minutes.
 It all BOILS DOWN TO money at the end of the day.