I recommend it
I've had it since I got my kitty, so about 4 years now. The cat not only travels in it at least a dozen times a year, but also sleeps in it. I open the entrance and the top, and my kitty really likes it. Even though the material has holes for visibility, it's very durable—there's no way the cat will tear it, and she's tried more than once. Of course, it's not a big bag; my 5kg moggy fits, but it's more for lying down. If the cat wants to sit up, the top needs to be open. The handles and shoulder strap are a plus.