I absolutely love this hay buffet. I have tried about every option out there. Feeder bags, wooden racks, custom grid racks. All before this one caused a huge mess to clean up on a daily basis. The solid back and sides are the perfect solution. Openings are good size and just right for my two, not so small guineas. I paired this with the cavy cafe, which keeps mess to a minimum and off the fleece bedding. Also shipping was surprisingly fast. Thank you for another great product.