It may cost the same at the end of the day but you are more likely to get more traffic.
DOnt forget also that GG Adwords do negative keywords so they wont appear.
e.g. -free
Would mean dont include the word free.
Also use "" and [] around words.
widget
-rental
-cleaning
to cover all other areas of widgeting.
Just something I found usefull, especially on generic terms where your CTR is getting low, you will know that many of the impressions are caused by the most popular unrelated searches listed first on overtures tool.
SN
[webmasterworld.com...]
[webmasterworld.com...]
[webmasterworld.com...]
A quick run on the overture tool will show you uses of your generic term that will get many impressions but are not on topic for you. Those are the ones you want in your negatives.
SN