ACTUALLY JANE, I in fact am.
I work in an abortion clinic, and work in womens health.
I deal with birth control issues, and issues relating to unwanted preganncies.
Nonoxynol 9 does cause burning in a lot of women, it also increases the risk of HIV contraction due to it's 'harsh' nature. IF you are monogamous, spermicides are a good option.
Spermicides ALONE are not recommended for birth control, unless you are not very concerned about a pregnancy. When used with barrier methods they are more effective.
I know women that use spermicides alone, but they also would have an abortion if it failed.
I recommend spermicide and a diaphragm, which is pretty effective.
Hormones are not dangerous for most women, and many women happily use them for 20-30 years.
I myself do not use hormones, but I can have an abortion if my BC method fails.
AS a healthcare professional, I recommend barrier usage with spermicides.