5 years ago I did my first trekking ever with this agency to Annapurna Base Camp. It was the best trekking of my life and I’ve done a few ever since (Patagonia, colca canyon etc).
So 5 years later I wanted to do another trekking in Nepal, but this time with my girlfriend.
We went to the Langtang valley and I had the same guide as 5 years ago. This was super nice. I knew they are good and helpful.
This time we also had a porter for the first time. He had decent clothing proper shoes and was insured (I checked that upfront).
The guide, Niraj, and the porter, Sudip, made almost every meal for us in the tea houses to make sure it was fresh clean and hygienic. (Try the mixed steamed mo:mo, it was so good!)
I would highly recommend this agency for a trekking. They have decent prices, English guide, pickup from airport and they can help you with arranging an accommodation.
They also helped us renting a sleeping bag and poles. Any question you ask and they will try and help answer it.