Jan 5, 2022 - 7:39 PM
My guess is that cost would be more like 300 - 400 CHF. Just a guess.
How many of you are there? You may need a mini-van or some other larger vehicle with 4 or more and all the luggages.
Unfortunately I have no experience booking taxis for a trip such as this so cannot comment on integrity of the site you are asking about.
Suggest you talk with Lauterbrunnen and/or Interlaken tourist office. The latter will probably have more experience with transfers such as this. And any transfer service based in Interlaken will probably come pick you up in Lauterbrunnen for an extra fee.