DCSketch (now DCSKWIN) has been my primary sketch program for about 10 years.
Because Apex and WinSketch are commonly packaged with the most popular appraisal software, I've given them both a try. After spending a couple of days with each (not enough to become an expert) I decided that DCSketch has some capabilities that I don't want to give up.
To answer your question:
The features I need all involve the ability to easily modify the sketch at any time.
DCSketch lets me add, delete, drag, join, split, or modify walls, corners, or sections at any time during the sketching process. It's easy to check the living area at any time.
Here's an example - just sketched a condominium a few minutes ago.
Because the norm varies from project to project in this area, I'm never sure whether to use airspace measurements or exterior measurements. I first did the sketch using my interior measurements and was way off of the reported GLA's for that model. So, I dragged the exterior walls out 1/2' and the GLA was right on.
Whenever possible, I measure 2nd and 3rd levels in relation to the first floor. With DCSketch, I made a copy of the first floor, labeled it as the second floor and simply moved the walls to reflect the differences. Drew in the stairwell and the second floor was done.
If I get a mirror image of the same plan, it's simple to do a flip.
When I measure a large irregularly-shaped home, I like to take measurements from reference points in the yard. With DCSketch, I can set a reference point, figure out where the measured points are, and just connect the dots. Had a job recently with about 50 corners on the house and the major sections were not at right angles. With DCSketch, I could get the most important lines down, correlate them with the reference points and interior measurements, and then fill in the blanks for the smaller details.
You can even take a whole section of the sketch and rotate it. This is handy when you have a complicated wing that's oriented 37.5 degrees off of the main house.
I'd be very interested in hearing any disadvantages to DCSketch. I can't think of a single one.
Koert
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Arguing with an appraiser is like mud wrestling with a pig... You soon find out the pig likes it!