Yes and No. I have very mixed feelings about the "People to People" program. When I was younger (more than 20 years ago), I went on one of their trips as a "Student Ambassador", and was very proud to have had the privilege. However recently (when my non-verbal, severely autistic son got his letter in the mail), I discovered that the program isn't all it's cracked up to be, and I'm not entirely sure where they get their lists of students from, but whatever they write in the letters (about being chosen/nominated by a teacher) is a complete lie in most cases. It seems that it is just a marketing scheme these days, rather than the great opportunity that it started as.
Would the trip be fun and exciting... sure, but I would just advise you and your parents to do a lot of research (talk to other parents/students who have been recently) before putting the money up for it. You could probably get a similar travel experience for a lot cheaper.
I've gone on a people to people trip once, one thing to make sure you have a good time is that you don't go with the high school group, make it middle school or don't go. You hear horrible stories about high school trips, where as mine went by with hardly any error other then a flight delay. For sure people to people isn't as selective as they should be, but if you can get along with all kinds of people then its worth while.