Hi L.,
Unlike the other responses, I absolutely love my hair relaxed! It is shiny and soft and more manageable. I get my hair relaxed about 1-2 times a year at the salon. However, it really depends on your grade of hair (I am of mixed race - my mom is white and my dad is black, so I have a combination of the two types of hair). I really think it also depends on who you let do it and the brand of chemical they use.
If you are afraid to get it relaxed, you could always buy a flat iron (I use one of these on my 4 year old's hair - as well as my own). There are also blow-dryers that have attachments that can be used during drying to straighten out your hair (con-air has one that is suppose to minimize frizziness).
The least you could do is go to the salon and ask them what they think. I really liked the JC Penny's salon in Woodfield Mall, as the lady who did my hair there was fabulous (she is a Master Stylist and her name is Mary)! However, they are kind of expensive (depending on the length of your hair - mine ran around $110 each time). But when thinking about price, remember that saying "You get what you pay for." I use to get it done at a cheaper salon - and it washed out everytime!
Again, I think each person's results are different because of the grade of hair and the brand/type of chemical that is used, and whether or not your hair stylist is experienced in the hair-straightening process.
Hopefully I haven't confused you since my results are not the same as the others.
K.