My allergisr said that a water vacuum is best so I thought I would try this. 
This is pure trash. It seemed flimsy when I put it together but the other reviews said it worked well so I though I would try it. It worked ok ( not well, everything had to be gone over twice ) for about a week. Then it started spewing water from all sides. I assumed I hadn’t put it together properly so after drying my floors and walls I emptied it and started over being meticulous in how I put it together. Well, it spewed even more forcefully. When I started to open in to empty the water one do the flimsy plastic clips blew off in my hand. I just put the whole thing in the trash. A complete waste of money, not to mention the time to assemble it, clean up all the mess it made and re assemble it. 
Save your $$.