Advise me, flist!

About two years ago, I got a Dell Inspiron laptop. It's great, and has worked perfectly ever since. Thing is, the warranty is almost up. I recently received an offer from Dell to renew the warranty for $300. This would cover things for three more years, although (of course) there's about a hundred little footnotes concering what would and would not be covered by the warranty. I am on the fence about whether renewing the warranty is a good idea, or if it would just be a waste of money. Any thoughts? Anybody out there who has dealt with Dell for warranty/repair stuff who would like to weigh in? People who are a bit more savvy about these things than I am? Anyone?