I was excited when my husband came home with this bike rack because it is so light compared to our previous one. I'm able to mount it to the hitch without his help. But that's where my independence ends. It takes the two of us to maneuver the bikes and it most definitely does not fit 4 mountain bikes. And, it is unconscionable that I should need to purchase a $50 extender bar in order to be able to fit a bike onto this rack!!! In addition, after fighting with the rack to get the bikes on, I then have no strength to pull the rubber straps tight enough around the bars. Besides, when your hands are sweaty from fighting with the rack, you're not able to get a good grip on the rubber straps. And, by the time I've gotten the bikes onto the rack, I've got no strength left for mountain biking. Its difficult taking my kids biking without my husband because I need another adult in order to get the bikes back onto the rack. Plus, a plastic seat stay has already fallen off as they are not securely attached.