GoldenPass Resrvation help!

Nivi, This is a lot simpler than you are making it. All Swiss rail routes have at least one train per hour and reservations are never needed. Look at the map here and look up times and prices on www.sbb.ch
The Golden Pass Express is merely one of the many trains on that route, the only difference is that it has which has extra panoramic carriages on it.

Just get up in the morning, go down the station and get the next train to Zweisimmen (change trains), Spiez (usually change again) and Interlaken. Most trains on this route start at Montreux, but they stop at lots of places on the way, including Gstaad.

If you prefer a printable timetable, click here. As you can see, they all stop at Gstaad.

A lot of the posters on this site have a poor opinion of Rail Europe.

Thanks Chris. However, I guess I was not very clear here in my question. I am looking to take the Goldenpass line (panaromic/scenic train) that I believe will run out of seats during peak season if not reserved. The website says it runs from Montreux - Zweisimmen - Interlaken. So will it apply to this train aswell? No reservation required? Heard the Montreux - Zweisimmen one gets pretty full in peak season.

Rail Europe's $21 seat reservation price covers Montreux-Interlaken with connection. Per the Golden pass site, the 8 CHF is for Montreux-Zweisimmen and then Zweisimmen-Interlaken reservations cost an additional 5 CHF. There is no "discount" on the seat reservation price when you board in Gstaad, but you can do so.

Seat reservations are not required (except for large groups and for VIP seats near the driver) but they are recommended in high season. Reservations are also sold at train stations, which might be easier, since the newest version of the Golden Pass site seems to have "too much" information without being very user friendly.

Nivi, I am not totally sure I understand your confusion.
The Golden Pass train is merely one of the many trains on the Montreux - Gstaad - Zweisimmen - Spiez - Interlaken route. Your Swiss Pass is valid on any train. On some trains they add extra carriages with panoramic windows and call this "Golden Pass". It does not matter whether you go on this train or any other train, the view out of the window is the same.
If you want to have a seat on these special carriages it says "Booking recommended in peak season", and you can do so at here, or you can do it at the station. But if you are happy to look out of normal size windows no booking is necessary, just turn up and get on. You do not need a reservation.

You can get on the train at Gstaad, or any of the other intermediate stations.

We rode the Interlaken-Montreux section out of peak season and there were plenty of seats. My Rail Europe advisor even said don't bother, the train won't fill up. They were right.

However, if it would make you more comfortable to have a reservation, make it. You don't want to stand during this scenic ride. It also matters if you're in first or second class, first is always going to be less crowded.

Thank you all! Guess I was just too concerned and confused looking at all the various forums and websites! Really appreciate it.

And if you have 1st class train tickets the carriage will be even MORE seats available. RailEurope Advisor - now THAT's funny! Did you ask if they had actually ever BEEN to Switzerland or actually USED the product they were "advising" you about?

No, they offered an opinion. I did not interrogate them as to the basis of their knowledge. And they were right, so you can't take that away from them even though clearly you have some "issues" with RE.