My wife likes the yellow as then it doesn't get mixed up with everyone elses phones.
The phone itself is a very good entry level smartphone, to see if smartphones have a place in your life. Either that, or you are operating on a budget.
I do think if my wife decides she likes having a smartphone, next time I will go for a slightly higher spec model.
The two things that are most different from something like the Galaxy S2, are: 1. The camera. Doesn't seem to focus very well, so pictures are a little blurry. 2. Screen resolution. whilst it's not a big problem, reading a webpage you do notice the significant difference between this and a top of the range smartphone. but that's why it's cheap!
A perfect introduction for those who want to be welcomed to this century, those on budget, or if you need to buy your kids a phone.