I was super excited about this mop, since I have been looking for a greener alternative to my swiffer for a while. However, it was nearly impossible to assemble the two pieces - they’re supposed to lock together, but the fit was far too tight.... it took two of us ten minutes of pulling apart and pushing back together for it to finally lock into place. Once assembled, it works great. My only fear is that it will run through a lot of cleaner liquid cartridges, since each one only provides for one full water canister.