I went with Arun in 2002 on the Makalu-Everest trek. We crossed the Sherpani and West Cols, and spent a night each at what I was told is Baruntse Camp I and Base Camp (in that order).
At the time Arun was owned by Gary Guller. He summited Everest the following year, with one of the Sherpas who was with us, and it now looks like he has sold off the company to his Nepali associates. When I went it was a small group: 4 trekkers plus Gary as leader, and the staff. It was an outstanding trek, one of the more difficult to organize, but Arun handled everything smoothly and efficiently. I can't say if there have been any changes with the new ownership.
We did lose a porter to altitude sickness in the Hongu. He had been with us since the start at Tumlingtar and collapsed when we were at Panch Pokhari. Every effort was made to save him, but the evacuation involved first ascending 600 meters. He succumbed on the descent. It could have been any of us.
I have a couple of photos of Baruntse on SP:
http://www.summitpost.org/view_object.php?object_id=76967
http://www.summitpost.org/view_object.php?object_id=77431
Good luck on your trip.