Thank you for answering my question about your tours. That will help me respond to your question.

Starting with the comment above to the effect that "you need to see the Lauterbrunnen Valley at least once in your lifetime": I agree that the Lauterbrunnen Valley is beautiful; it reminds me a bit of my beloved Yosemite Valley, where I lived for a year when younger. Now we always spend 3-6 days in Mürren, above the Valley, on our Swiss hiking trips. But Grindelwald is not in the Lauterbrunnen Valley; it is in its own valley on the other side of the Männlichen ridge.

(Note that some comments above place Grindelwald in the Lauterbrunnen Valley, or confuse it with Gimmelwald, which is above the Lauterbrunnen Valley. Or address the Berner Oberland in general, rather than specifically Grindelwald. Som view those comments with that in mind).

My guess is that with 2 nights there, the tour includes a trip up to the Jungfraujoch on the intervening day. The train goes right up to Kleine Scheidegg (where the Jungfraujoch train starts) from Grindelwald, and unless they return by the much longer route,down through Wengen and Lauterbrunnen and Wilderswil, changing train several times on the way, you would not see the Lauterbrunnen Valley at all.

As for the Jungfraujoch trip itself, assuming that is on the itinerary for the tour that includes Grindelwald, my personal view---and I know I am outlier here----is that is is overpriced and overrated. I have been up there twice, the first time on a hiking tour with my local hiking club. The Jungfrau was included in the price, on one of our rest days from strenuous hiking, so I went. The little train from Kleine Scheidegg up was packed, and my discomfort was increased by the 45 minutes we spent in a dark tunnel through the Eiger. (They do stop the train once at the windows carved in the rock, and everyone disembarks for a look out, but I could not get close enough to see out before it was time to get back on the train). At the top, you are in an enclosed building. You have to take an elevator up to the main level, and everyone leaving the train tries to pack in like sardines. Once I did get on and ride up, I found the main space very crowded as well. It was lunchtime and I was hungry, but the lines for food were so long I gave up and went outside. I suggest you be prepared and bring your own food and water if you do go on this excursion.

The view from outside is impressive on a clear day, but not too different from what I have seen on other mountains as a skier and hiker. And for me, not worth all the trouble and the time in a dark tunnel (twice!). So why go a second time? I planned and organized a trip Switzerland trip for 9 family members, and they wanted to go up the Jungfrau, so we did. It was a cloudy, snowy day, so it was not as crowded. Once at the top we found our way to the ice palace, which was interesting, and then went outside so the teens could play in the snow, along with lots of other kids. That part, at least, was fun.

Grindelwald is a nice enough little town, with shops and restaurants, and beautiful mountain views. But apart from a very small pedestrian zone, it has lots of traffic, which diminishes the charm considerably.

Have to run . . . . I will finish this later