I would have to agree with you on your comments. I've experienced the same thing. My hubby is always at the house since day 1 of reno but ID never turned up. I wouldn't say never but from Sep 29, 2010 until today he appeared around 4-5 times only. The ID didn't even bother to come down until the size of our newly constructed store room was decided by the contractor. It turned out to be bigger than what we wanted. Being accomodative, my hubby said it is ok. Otherwise, we could have asked the contractor to demolished and rebuilt a correct one.
For workmanship, grouting and plastering jobs were not good. Waterproofing also bad. Water from shower area seeped out to the area near entrance.
Project took 2.5 months to complete. Only see 1 contractor at a time from day 1. Our mistake was we thought that resale flat must be completed by 1 month so that was why we didn't ask the completion date. When asked, we were told that it can be completed before x'mas. We insisted on end of Nov 2010 but now still have a few more to finish. Estimated if all goes smoothly by Dec 4, 2010.
No hidden cost they said but additional quotes are so expensive. In the end, we only let them do the major work but other things like window, grills, rewiring, built-in cabinet, etc all we outsource.