I have one and LOVE it. I'm sorry but, there are times a 3-4 pound dog gets tired much quicker than you do. We do a lot of stuff in the summer and I love the fact that I can take all of them, put them in the stroller (there are also 4 safety hooks) and not have to worry about someone snatching them, or people touching them and wanting to pick them up and they can rest if they want to. People can make fun if they want, I really don't care. I get made fun of all the time because of how much I love my babies. I think about their comfort and well-being more than what people think about me. Post people just go crazy at how cute it is.
I attached a couple pics of mine from the first day I got it.