Sergey and his helper were on time, professional, thorough, kind, and cleanly. Although they were clearly experts, they took the time to review my ac unit's specific instructions which made me feel a lot more comfortable. They screwed the ac unit into the window, installed the necessary brackets, and even used the foam insulation to ensure the seal was as air tight as possible. I'm very pleased with the work and recommend them to anybody looking for ac installation help. read more