I am an early adopter of Decktools. I signed on with them way before there was any thing but blue lines, no full color 3D rendering, no in depth take-offs........
I am about as slow a learner with new software as you'll find anywhere!
I don't take DT w/me for every meeting as sometimes the project would take to long to draw for them as they are waiting. I will usually bring it a long for the simpler projects and let them see what I have in mind.
I always bring my computer on the second visit to show the design and make any changes at that point w/the client sitting there.
All of this being said the program is excellent for decks and all of the accessories that go with them. For arbors, pergolas and other shade structures the program is very good. The one lacking piece is patio covers and such as these are labor intensive to draw and a harder to modify when sitting with client.
I have to admit it took me awhile to feel comfortable to sit at someone's house and design their deck. This was due more to me then the program, as I am a perfectionist and want everything be just so........
I finally realized that the design I could show them in 3D, quickly, would blow the doors off of whatever me or my completion could provide on paper!
Over all I am very happy with Decktools and would recommend you really look into purchasing it!
The users support forum if FANTASTIC! There is a file sharing section that will knock your socks off!
Hope this helps,