We climbed Kili last month, went by the Lemosho route (8 days) which was breathtakingly beautiful and scenic and we chose Jerry Tanzania Tours over a few other outfit (local and international). I'm so glad we did. The whole experience was great and I would definitely recommend Jeremia and his team. He answered all the many questions I had over email and all his answers instilled faith they were professional- from the camping and food arrangements, to the way they treat the environment and the medical experience of the team.
Definitely check the guides are medically trained- we had check ups every morning and a lung test every night.
We also took Diamox from day one and it saved us from serious altitude sickness and made the climb far more pleasant.
The guides on the climb were excellent- they knew the mountain inside out and really looked after us and made sure we managed the climb - I genuinely couldn't have done it without their support (literally!)
It was the toughest and most rewarding thing I have done and I am glad we chose Jerry to get us to the top!

After much research into companies, my fiance and I decided on Jerry Tanzania Tours. It was the best experience of our lives and we are so grateful to Regan, Brighton (our two guides), our cook, and our many porters who helped us to achieve one of our dreams. 
From the time that we were met at the airport, until the time we left Tanzania, we were well cared for. Transfers were easy, payment was easy. It was a great experience. We even decided last minute on a safari which was easily set up for us on less than a 12 hour notice!
We hiked the Rongai route in 7 days. It was amazing. Although was raining, it was really enjoyable. The Rongai route is great because, although you climb a less traveled side of the mountain, you also climb down the busier side. Every day of our trip started out with a fabulous HOT-yes hot breakfast, included a hot lunch, and yes a hot dinner. And I can’t tell you how excited we were to have hot chocolate to drink every night. It really hit the spot. The food was different for every meal, and felt more like we were out to eat. It was really good. They treated all of our water every day, so we did not even have to use our iodine tabs. Every night when we arrived at camp, our tents were set up, as well as a snack of tea and popcorn awaited us. Our guides paid close attention to us, making sure we were eating and drinking enough, as well as watched us closely for signs of altitude sickness. We all took Diamox, which was helpful.
The climb itself was pretty easy, except for the summit night, which is doable, but tough. Our guides did a great job of watch out for us, assuring we were safe, and getting us to the top. The night of the summit, we brought along a couple extra porters to carry our day packs and extra water. We felt as though these guys were always well prepared and thinking a few steps ahead, which is the reason we made it to the summit.
Overall, we were thrilled with our choice of Jerry Tanzania Tours for the climb. Although we decided on last minute for safari and it was great as well (saw all of the major animals, almost no rain, and car never broke down). We can't say well enough about this outfit and program. If you're looking to trek Kili, go with these guys.

My husband and I chose to climb Mt Kili in August 2018 with the operator Jerry Tanzania Tours. Based on their reviews they were safe, had a great success rate, and very knowledgeable of the mountain, terrain etc.! We chose the 7 day Machame route. We were beyond pleased with our guide (Pascal) and assistant guide (Regan) along with our chef and porters. We had amazing meals, never felt unsafe or too tired, and always knew the planned routes, timetables etc. We successfully made it to the summit, which was the most amazing accomplishment! (We do advise getting Diamox, acclimatization pills - they helped greatly)! We'd highly recommend this operator to others who'd like to take on the mountain!