They arrived earlier than scheduled, which wasn't a problem for me. Scope of work meant that they were on site during the time that they were scheduled. My only two problems with the service were 1) the cleaning agents effects on my plants, and 2) the confusion regarding sealant for the driveway. On the first point, I assume they used a bleach or chlorine solution. After the cleaning, a number of my plants began to lose leaves - it MAY be because of the solution used. We'll see if they bounce back - they are a hardy native Florida breed. On the second point, I received a reply on Thumbtack from NBM with the price and the following blurb "Want your property right? NBM has you covered. Roofs pool decks walkways driveways, we do it all!!!! Power wash and seal coating". I assumed that the price quoted to me included both. I even asked further questions regarding the sealant in private communications on Thumbtack. When they arrived at my house to perform the cleaning, the gentlemen had no idea about the sealant and said that it would cost extra. Now, shame on me for not making it explicit that I wanted the sealant and not getting a commitment in writing (at least online). So perhaps a change in wording by NBM should be considered in future communications, or explicitly state that the quoted price on Thumbtack is ONLY for the wash. Otherwise, I was pleased with final results, the time it took, and the attention to my driveway.