I have about 3 or 4 of that type. The hole spaces are bigger than the ones that were recommended earlier on in the thread. Also the handle has been known to come apart, not good with a cat inside it. It is not as well hinged as the other models either. I ordered mine thinking they were the same from the website I used, unfortunately they are not quite.
I like the idea of the ones that can nest inside one another, great for us who rescue from home. My original carrier was used for over 20 years and was the type I prefer, I gave it to someone who was having a rescue cat from us, so as far as I know it is still in use. The plastic had started to crack in places, and I moved it on to ensure good infection control and ease of cleaning.