I usually read reviews (see the link at the bottom of this post), but not this time. In case you don't, you might want to read some reviews before buying a Black & Decker GH1000 Grass Hog XP. I bought it from Lowe's today but haven't used it yet. I'll probably take it back to the store tomorrow unused since it will be easier to get a refund.
I purchased and enjoyed a B&D GH600 Grass Hog. Most of the complaints about that trimmer appear to be based on the fact it feeds line automatically so you have to avoid running it up against something that repeatedly breaks the line. Pulsing the trigger works for me. The other complaint, that for some people the automatic line feed stops working might be valid. It must be a very sensitive mechanism, how else could they get centrifugal force to keep a short line to within about 2 inches? I gave that trimmer away. I would have bought another but I wanted larger diameter line. I feel like avoiding Black & Decker now.
Back to the subject. If you go by the dozens of nearly unanimous opinion of users on Amazon.com, the GH1000 is a dangerous product. You probably won't want to have your kids (or anyone you care about) around when you're using it for the first time.
The ratings are arranged lowest first. Over 75% gave it the lowest possible rating and some begged for lower.
Take care.