Went to Expo recently to source for an ID, found Image's 'very huge' showcase and went in to try my luck. Was served by an ID, seriously don't remember his name. Anyway I have to admit I was pretty fussy on what I wanted, sat down and discussed through with this particular ID. Point 1: failed. I gave him a floor plan that was corrected to the right scale, he just scribbled on the plan for a rough layout. A pro will definitely use a ruler to mark out the items ie plan view layout of cabinets, wardrobes, etc... with the estimated dimensions. Of course that's my own opinion, each ID has his/her own way of doing things.
Halfway through, felt that he was somewhat pressurised by what I wanted, cos I was pretty meticulous and this ain't my 1st time doing reno, therefore I exactly knew what I wanted. Sensing that he can't snook me, he was like rushing through the whole process just to get it over with. By then I had already given up cos I knew he wasn't listening to my needs, didn't ask much questions.
Not saying that Image isn't good, just that you have to depend on your luck for the choice of ID to serve you.