Black & Decker or any other electric lawnmower is a far better choice than any gas powered one.  Gas mowers are 10 times more polluting than a car.  Electric is so easy to start, use, and convenient.  There is virtually no maintence, no gas or oil to deal with.  Unless you have over an acre, maybe a huge yard, you might have to do it in two days and plug in, but we have a quarter acre yard and it's just right.  Save so much money and trouble.  I don't have to nag my husband to mow the yard anymore, sometimes I even do it myself because it's so easy a 5 year old could do it.