I do not have the Thea but have the Becket Henley Feed Bag. The Henley has a wider strap. I loved carrying this bag because it was slighty structured but slouchy and had an ease of use...especially with the magnetic closure. I, personally, do not think I would care for the thinner strap of the Thea. The feed bags have a little weight and when you add your things it can get a bit heavy and I am sensitive to heavier bags whether carried on the shoulder, arm or in hand.
I usually carry a coin purse, card wallet, nylon clutch with a few necessities, a pill case, and tissues. It is not much but when it is all concentrated in the center at the bottom of a bucket bag it just feels heavy.
I do love all the beautiful colors the Thea comes in. Which color caught your eye?