Marin County Arborists are always wonderful. They are polite and tidy. They are always sure to clean up when they're finished. Most recently, they were willing to make a few changes for me, like doing a few snips here and they even let me trade one part of the yard to have another part done instead. They didn't charge me a different price for the change in work. They are the best arborists I've come across and I highly recommend them.