Nope, I don't like it.
I tried to recreate a wallpaper I made for TS2 but the way this works is you put an image (sticker) on the canvas and it just repeats it. The main problem is the largest sticker you can use is 256 x 256 pixels. This is fine for the width (256 pixels would be one section of wall) but a wall from floor to ceiling is 768 or thereabouts, so when you put a 256 x 256 sticker in place, when you apply it to a wall, it will repeat itself three times up the wall. That's ok if you just want a standard pattern, but as soon as you put something like a base board, ceiling cornice or heaven forbid, a mural, then that will be repeated up the wall. What it needs is the ability to change the canvas size to suit walls.
I can't see me using this too often because of that shortcoming.
Which is where I was the second time I used it; trying to do the math to make it come out the way I wanted to. I tried to perform the calculations in the worst of all places: my head.
BTW, this is part of a set I did for TS2... I was trying to recreate the basic wall for the set, which was just the white baseboard and the pink and white vertical stripes, but with this tool I ended up with 3 white stripes across the wall
I've noticed that what look like vertical stripes on patterns come out horizontal and vice versa. Did you try that? Though obviously that doesn't solve the length of wall/repeat to fill issue.
I must say I was in serious danger of engaging in exclamation abuse when I saw what you made. Not my style, but wow! I've never created anything that elaborate on a computer! My first two CAP projects were obviously suited to repeat, but tonight I did one that, aside from poor color choices, is (I hope) a little more free-form looking. Is there a venue here to get feedback, or am I forgetting the Forum Rules too quickly? I might be able to upload them to photobucket, but then, if it's allowed, I'm not sure how to get them into a post. I've only done that with the Sims 3 site forum and there I had to cut them down because of size. I don't think that will be an issue with CAP images; assuming I'm allowed to put them up at all.
I don't know if I'm making sense, so I think it's time I'm off to sleep the sleep of the truely knackered; buenos noches!