Rinjani is a challenging trek but Hajar provides the best circumstances to conquer it and enjoy your time while doing it! I've had a wonderful tour with the friendliest and funniest porters and guides I could have hoped for. We also had a nice and supportive group (only 7 people so not too big). Hajar probably gives you the best price considering his service that includes pick up and drop off and a night at the camp in Senaru prior to the trek. He's very quick with communication (via telephone and email) as well. 

Ini agen emang tiada duanya. Pak Hajar mang pengalaman banget kostumisasi itinerary perjalanan kami, sekali liat dia tau persis gimana ending-nya. Guide-nya jago banget ngocok perut ada aja yg di jadiin OVR alias Overa Van Rinjani..... perjalanan berat gk kerasa eh dah mau sampai. Pokoknya semua bagus-bagus, lancar dan recommendable deh!