Bro magnifizio,
i think it isnt exactly fair to compare the 3 KC makers here by their response time. All three of them did not really advertise their services...most of the advertising came in a form of feedbacks and recommendations from customers, and posting of their end products.
some of them are do not come online as often (as u've noticed steve and Tim have not posted here for some time).
well...if you seek attention, i would suggest to call to arrange appointment at show room/site. cos thats what most of the forumers here did.
Tim's response offline have been decent by so far. and i've called him over to my house to take measurements twice, and twice without fail being on time.
I have also engaged UnityD for quotation. But with all due respect to Erny and team, i did not choose them but chose Tim mainly because he's closer to where i stay and 1st time meeting was pleasant. (erny, excellent response from your design team on the 3D and quotes)
at the end of the day, pick the one you feel most comfortable with AFTER engaging them PERSONALLY, and not online >_<
sorry if my "english" abit harsh... hehe. having brain freeze after lack of sleep last nite