I own a 2004 TSX Navi same as Euro Accord and US model so I maybe able
to help as they both use the same Navi system.

Just like everything else, there is a lot to like about the Navi and
some things that are not so perfect. Since I tend to be a
perfectionist and very critical this may be skewed more to the
negative.

First and foremost, each and every time you start the car the first
thing that appears is what I like to refer to as the "Don't Sue Us
Because Your Too Stupid Screen" This consists of a disclaimer with
some weasal words indicating, I'm paraphrasing here - if your too dumb
to program and operate this system only at idle and decide to drive and
have an accident... don't blame us.

The problem is this screen lasts and lasts and lasts. So you must wait
for about 45 seconds (it can't be defeated) for it disappear before you
can use most accessories. You can use the audio and HVAC systems but
with limited functionality.

Entering destinations into the Navi is fairly straightforward but can
be cumbersome depending on the method.

For example, if you are entering a destination from the database such
as a restaurant, bank, ATM, etc., you can perform this by voice
commands alone. BTW, voice commands are cool, you can control just
about everything exccept your passengers and idiots in other cars

On the other hand, entering a non database address (friend, non-listed
restaurant, etc.) is not completely hands free and requires manual
keyboard entry. Hence, the disclaimer screen.

There are few times when the system will baffle you by responding
incorrectly to your commands but these are ususally due to limitations
in the technology which means you are in the wrong menu screen or
ambient noise is too loud preventing the system from hearing you.

Another issue, the Navi supplies a few extra features such as a
calendar, calculator and a trip computer providing engine run time,
miles since last refueling and average fuel mileage. BTW, so far the
fuel mileage readout has never been accurate as it's alway overly
optimestic by about 2-3 mpg compared with a calculator.

Anyway, this screen is in a menu called "trip computer" nested under
another screen called "information". If you view this screen and try
to use a voice command, it will respond incorrectly. Inidicating you
need to back out of this menu and return to the "main menu page" or
"map screen" for it to function properly.

To be fair, these are mostly nitpicks as the system works very reliably
and saved my butt numerous times, especially when getting lost on
Claifornia freeways or trying to find a location you've never been to
before. Which is why you want it?

Another small shortcoming involves deviating from a current route.
Let's say you're going on vacation or a long trip and want to stop at a
restaurant along the way.

Currently, you can't choose the menu mode to find a restaurant without
cancelling the current route first. So you need to cancel, go back to
menu, find a restaurant, plot it and after you get there, retrieve your
previous route or replot it and continue. Sort of a pain unless you
know in advance you will be stopping along the way and enter this as a
seperate destination.

I understand the new Odyssey and Acura RL allow for adding new routes
to existing ones?

All this brings up a fundamental problem with the technology, it's
still evolving. You could argue, maybe I'll wait for it to get better
or cheaper? Trouble is, it always will be changing and improving. If
at some point if you decide you must have it, just say what the hell
and go for it.

True, it's more fun to "talk to your car" and tell it change the
temperature, radio station or ask it how long it will take to get
somewhere. But the price is steep, about $2K.

Something else to consider, if you plan to keep the car a while, you
will want to update the DVD software at some point. It contains the
maps, restaurants, ATM, gas stations, etc. The updates occur about
every year or two and currently sell for $185 + shipping
https://iweb.alpine-usa.com/Hondadvdsales/naviorder.php

This leads to your last question, is it worth it? Tough to say, as
it's a subjective question and only you can decide if it is. Many
might argue you can buy a lot of maps or even a portable GPS unit with
plenty of change left over for $2K.

In my opinion, you can't wait for the "perfect time to buy a car that
will be perfect." Never gonna happen, it's always emotion based. Try
to find a dealer or someone that will let you play with a Navi for a
couple of hours and decide if you can't live without it. That's what I
did.

Sorry for the long post and hope I didn't paint too bleak a picture but
it's always good to know the downside of stuff as most advertising is
the opposite. Just to end on a positive note, you can program the Navi
voice command to prompt you in either a female or male voice. So if
you're tired of being lectured by a woman...you can always switch

Good Luck