I used to work in the lawncare industry, so heres a little insiders tip - switch the Echo out to the biggest line you can put in it. If you can get .95 or .105 line in there, do it. With an inexperienced user (and even with a pretty good one), you'll go through far less line and frustrations with big line. With .80 or so, it just breaks right off every time you hit anything. With .105, it tends to wear more than snap.
Also, the bump heads that most line trimmers come with work for a while, then break down inexplicably. Eventually, you'll notice it starting to not advance when you bump it. At this point, you're probably best off replacing it with a fixed-string head (Echo makes a good one, you can get it off of your local Echo dealer). You just cut 8 inch or so lengths of line, and slip em in as necessary. Its not as handy as a good bump head, but it sure beats the hell of out a bad one.
-Tim