We did a private tour with this company in June 2019 and had an amazing experience, not least thanks to our guide and the two porters who carried all the stuff to the camping area and back down again. Due to that the 2018 year’s earthquakes caused some really big damages on the volcano, the tour between Senaru and the camping area at the crater rim (2641 m) is the only one open, but we felt it was totally worth it anyway and the trek felt safe all the way.
The sleeping bags and the tents were in good condition, the food was good (traditional style), and at least the guide spoke good English and told us many interesting things about Rinjani and the surrounding, which made the hike really fun. He also confirmed that he considered this company to be a good one to work for, which we felt was good to hear and is really worth paying for.
The trek itself is physically though but if you are up for a challenge, this is one really worth doing. Fantastic views along the way and the camp area at the crater rim is just amazing. I definitely recommend it and will choose this company again if I’ll get back!