This trip seems expensive but was definitely worth the money. Without the super jeep and snowmobiling I think the Golden Circle tour would've been a little boring, I would recommend going for this one rather than the standard coach trip. Gulfoss waterfall, the Geysers, and Þingvellir were really beautiful places to see, a shame it was raining but that was to be expected in October. The jeep then took us to Langjökull glacier, there wasn't any snow on the ground and it initially didn't look that nice as it is covered in volcanic ash, however once you get going on the snowmobile they take you further onto the glacier and all you can see is ice around you, and it started snowing. Our tour guide was very informative and friendly, he seemed to know a lot about each of the areas we visited.
Overall I would say this tour is worth doing, probably the best thing I did during my visit to Iceland.