My Great Pyrenees is a rescue and has joint problems that limit her ability to walk longer distances. I thought this would be the perfect way to get her out and about and enjoy nature with me. I also plan to use the bike to run errands that need more capacity than a normal bike would provide, like grocery shopping or going to the YMCA with my giant gym bag. I like the front-opening door - having a 140lb dog, there's no way I could lift her into the bike! I wish the cargo box was a little bigger - it's a tight fit for her in there lying down.