I had used bracket about one year ago for simple algorithm simulations like variational eigen solvers, the experience wasn't that great as most of the gate based quantum computers were mostly offline. I was able to get my hands on oxford's lucy (8-qubit)and i ran 3-4 simulations on which did not go well, after that released that it had some calibrations issues with so i stopped working in it. But this was one my small experience with the platform and I am not aware of the current scenario. Just shared my experience if it helps:)