I guess I have mixed feelings about it. The doll does have a certain creepiness factor to it, but I might have bought one for my own daughter back in the day if she was really excited about it and asking for one. She's too old for baby dolls now and she never played with dolls anyway, so it's easy for me to say I would be open to getting her one because it's a non-issue. However, I would never get one for someone else's kid. This doll is a parental decision, lol.
Although I think it's kinda creepy, I don't find this doll particularly offensive and I don't think it's encouraging girls to grow up too fast. Little girls (except mine) have always pretend-played mommy. It's a huge part of their development and shows that they are identifying with their same-gender parent. I took a spin as a preschool teacher for a little while, and lots of the little girls were pretending to breastfeed dolls. They're just copying what they see their mom do with their younger siblings. So many moms exclusively breastfeed now; giving a doll a bottle is not something many little girls would think to do because they haven't seen that behavior from the woman they are emulating. I don't see anyone complaining that toy baby bottles and dolls that pretend to drink from bottles are encouraging girls to grow up too fast. I think this doll is simply a reflection of the times.
On the other hand, all the bells and whistles that make this doll creepy aren't neccessary, so you might as well save your money. The little girls I saw pretending to breastfeed were perfectly happy with a plain doll that didn't make sucking sounds or motions. Besides, the electronic parts will probably stop working after a day or two.