We had a problem created by painters who washed plaster down our drain, it dried, and then stopped it up.  The first plumber started the job and found the plaster, then ghosted us.  H&M came out as promised, gave the worst case scenario estimate (which was lower than the lowest of the first plumber), got the utilities out to mark the lines, dug a 4ft trench, finished the job, and the total was less than the estimate.  They did the whole thing in ONE day!  Many thanks to you, Romauldo, and your helper for fixing our 2 weeks long plumbing nightmare!!