Putting the parts together was tricky. The paper manual was not very clear, I had to rely on video and ultimately, husband, to put it together, adjusting to my paticular dog's physique. But good for dogs with only back leg weakness. My dog has DM, so front legs are getting weaker now, and I am sorry I didnt know about the SitGo, which I am considering buying, even though I don't think my dog has much longer now. At this point, given his deficiencies, the BFM wheelchair/ maybe better, the SitGo,is my dog's closest possibility of independant movement.