My soon to be year old Tiel, can now come out on our travels. She doesn’t like harnesses, no matter which one we tried, so this was the next best thing. Now that she’s flighted, it’s definitely the safest option, I haven’t experience any issue with the perch sliding or rotating, it fits snuggly where it’s supposed to. We wrap all her perches in Koban for foot safety. The backpack is comfortable for me and has even been used for our small dog when the perch is removed. Worthwhile purchase.For a full tailed Tiel, I haven’t seen any issues with her tail being squished and she monkeys around no problem inside. Can’t attest to the bowls as we don’t use them.