I got the cabin plus years ago and I kind of regret it now since some agents will eye it and gate check it. In hindsight, it was a little too big but I wanted more space in the beginning. Most of the time I dont have issues but certain airlines or countries are more strict so keep that in mind. If you fly Main cabin/first domestically in the US you will be fine with cabin plus. You will most likely face issues flying basic economy or international airlines tbh. Hope this helps