Yes my husband and I have been. It's a very small cable car, like 4 or 6 people maximum as I recall. We were hiking from Murren and ended up in Sulwald and took the cable car down. We had the swiss pass, this wasn't completely covered, so we did pay, I can't remember exactly how much. We paid at the bottom, no window at the top. There was a restaurant/inn nearby that we had a nice beer and rest. Then took the bus to Lauterbrunnen to get back to Murren.
Such beautiful country, we wouldn't have sought this cable car out, we were there in August and the hiking there was nicely shaded in the afternoon so that's how we ended up over that way. We were in the area 5 nights, so had more time than most. I would recommend the Schilthorn or Männlichen or Pfingstegg for cool cable cars in the area before this one. Have a wonderful trip!