Yes, Berserkjahraun is worth adding when your Snæfellsnes day has room for a quieter lava-field stop with real texture and saga atmosphere. It is weaker as a rushed extra on an icon-only loop.
Berserkjahraun sits on the north side of Snæfellsnes, between the Grundarfjörður side of the peninsula and Stykkishólmur. It does not work like a single viewpoint where one photograph explains the place. The value is in the rough black lava, green moss, red crater slopes, small lakes, and the feeling that the road has slipped into an older, harsher landscape.
Add Berserkjahraun for self-drive travelers who want a quieter pause between headline stops and who care about geology or saga places. Skip it for poor visibility, strong wind, a nervous gravel-road driver, or a day already stretched by the Snæfellsnes Peninsula Road Trip.
Use it as a flexible West Iceland stop. If the day is moving smoothly, slow down here. If the weather is closing in or the route is running late, keep your energy for the bigger anchor that matters most to your plan.