This is an absolutely must-do hike if you happen to visit the berner oberland region. You may need to allot half day to full day depending on how far you want to hike here. Getting to Schynige Platte itself takes about 55mins from Wilderswil- so if you are on a fleeting visit to this region, you may not find time for this one. However, if you plan to be in the BO for 4 days or so then definitely do this hike on one of the sunny days. You will need to buy a ticket from Wilderswil to Schynige Platte even if you have a Swiss Pass (about 60 SF round trip), so in that sense it is expensive. But the views are totally worth it!!! On your way to Schynige Platte sit on the right side of the cogwheel train for some great views of lake brienz and lake thun as you ascend. During the initial ascend the views appear on the left side(in the direction of the train moving), but after a while, you get spectacular views on the right side.
Once you are at the top you have soo many hiking options. You can do the full day hike that takes you from Schnige Platte to First (a solid 6 hr hike and the last train back from First is at 4:30 in the afternoon so you need to start early if you want to do this one). There are 2 other loop hikes which are equally enjoyable and with GREAT VIEWS of mountains on one side and the lake on the other! One loop goes to Duabe and loops back (1:30 hr). The other goes to Panoramaweg(3hr). Initially, the path is a bit steep. But after you reach Daube it is an easy descend. This hike is a must do for its spectacular views! My husband and I enjoyed it thoroughly and we highly recommend it