When my old rubber coated changing bag started disintegrating, I decided to replace it with an upgraded system.
I first purchased the Photoflex and found the set up to be a real PITA. Once its up, its ok. I even considered that maybe I would just leave it set up once I got that far. But, to big, dust collector, not a good idea. In use, the arm sleeves are not it the best position, however, if that was the only issue, would live with it.
I then purchased a Large Harrison. Its is real easy to set up, arm sleeves in the right position, and very high quality. First class in every way. Yes, it cost more, and looks like it will outlast the less expensive ones.
If its affordable, go for the Harrison, its worth the extra investment.
Good Luck.