These flip flops are perfectly functional and get the job done. They could be a bit smoother but I used them as a shopping cart so I don't really mind. What I hated the most was the attachment process. The screws that come with it are probably the worst screws I've ever come across. The head of each screw wasn't perpendicular to the shank of the screw, so absolutely every screw wobbled as I screwed it in, resulting in constant slipping and stripping. I had to use them because I didn't have the right screws on hand. It was also not clear which of the many holes I should use for attachment. In general, the guides are not bad, but I plan to find an alternative to the screws.