This was great fun. The early episodes were the usual Ryan Murphy Technicolour emote-fest with the familiar touches that signal his work - famous personalities, high levels of self-indulgence, gorgeous settings and costumes and pointed dialogue that only very occasionally veered into the world of camp.
But by the latter part of the final episode, the picture of Halston was much more nuanced and sympathetic and using the Martha Graham costumes for her ballet Persephone that he designed, using weirdly unusual fabrics, as a sign and symbol of what he could achieve was very dramatically effective - and moving. Even though at this stage he had lost everything, including his name (which meant that anything else he designed could not have his name on it), this achievement was a powerful reminder of what he could do - and, finally, gave him, at least in this telling, some degree of peace and comfort as to his abilities and his legacy.
McGregor was superb ad the often vile, undeniably talented creator whose character and personality was as much if not more a creation as any of his clothes, was shown in its full glory and horror.
Good, sometimes dirty, fun.