My plumber, who is getting up there in age, recommended Avanti. My neighbor had a bad sewer leak and it was mitigating into my basement (I live in an end unit townhome). Dylan came out to investigate and concluded it was, in fact, my neighbor. He suggested I also get my line replaced as precaution since our lines were only inches apart and the development was older. They had to hand-dig and it was all rock, clay and shale. It was a tough job but Matt and Brandon along with their crew were excellent. Anthony, the owner, came later that afternoon with the excavator to drop stone and finish the job. I was pleasantly surprised with the yard clean up and they were very friendly. I also appreciated the fact that I was outside more than inside watching them and learning while they explained the process as they moved forward. I highly recommend them...