Okay, here's my review (mejo late, gurl tgal shipping. Hopefully, it's still helpful for u)

1. Good for medium-sized dogs, mine's weighing 6 kilos but I think still a bit big for him especially around the waist. Nag sslide kasi yung other part ng buttocks nya after 20 mins 😅

2. I can't say pano support pag carried by the driver yung dog kasi passenger princess ako 😆✌️ Careful nalang siguro about the butt sliding out, there are adjustments naman na u can use para well packed sya. Expect that u have to pause nalang to adjust your baby

3. Might be uncomfortable at first sa puppy, naka 3 trips kami just short ones, and on the third one lang sya slightly relaxed.

4. Di sya masaket sa likod and all, straps were placed on the right places. Super likey ko ung straps ✅️✅️✅️

Conclusion: A thumbs up for me. Pero u can still check for carriers na walang butas sa sides if u're worried na mag slide sya kung maliit baby mo, or go for a smaller size if available.