I've used "I Love This Yarn" for one project; working on another one right now. When I worked on my first project, they had only maybe three colors, now, they have LOTS! Maybe four different shades of blue, a couple of green, pink, two shades of grey, a rich brown, an aran color, white, black, red, a variegated autumn colorway, and that's all I can remember off the top of my head.
The two colors that I've used the skeins have come in 355 yards, but I think that the variegated might be a bit less yardage.
I didn't have any trouble with the yarn knotting for my first project, but we'll see how it is for this project. The yarn is VERY soft, and pretty economical ($1.99 per skein for black, and $2.49 for all other colors at my Hobby Lobby location). It's nice to work with, and now that it comes in a variety of colors, I'll be using it much more! I like it better than Caron's "Simply Soft" yarn because it seems a bit sturdier (Simply Soft splits a lot for me) and it doesn't get "hairy" when you're working with it. But it's every bit as soft.