I bought an apartment that had relatively new prefinished hardwood floors. I hired KK to strip them, stain them darker, and refinish them. Rudy was very responsive from my very first email, provided a clear estimate, and was able to schedule the work for when I wanted it done. The crew arrived right on time on the agreed-upon date and ready to get to work. As is sometimes the case with this kind of work, there was a slight language barrier with the workmen, but we seemed to be able to make ourselves understood. (Rudy was not on the job site--his brother Jimmy ran the crew.) The work on the floors took one day longer than expected, but that is because the finish on prefinished floors is very hard to sand off. The crew did a beautiful job--no marks from the sander whatsoever. They also did a very good job staining evenly in the color I chose. (I ultimately wished I had gone a shade darker, but that is not their fault!). They applied a satin finish that was also done beautifully. My only complaint was that the workmen were sloppy. They apparently put cans of stain down on the windowsills while they were working, so there were brown stains on the sills when I went over to check out the work. Having said that, when I reported the problem to KK, they responded immediately and when they came back to do additional work (I had also hired them to do some painting--though not originally of the windowsills), they cleaned up all the stains. KK's estimate was more than some of the other estimates I got ($3/sf instead of $2/sf for staining and refinishing), but I learned the hard way on a past floor job that you get what you pay for. This work was well worth the cost, and Rudy's responsiveness and flexibility made this a hassle free job. I would work with KK again and would recommend them.