I use them more and more all the time as I get older. I bought a lift buddy which is a devise sold by JWC. INC.
Check ebay under lift buddy This devise used in conjunction with the sliders is absolutely ideal.
You buy enough sliders to handle most of the furniture at one time.
Lift the furniture up with the lift buddy with very little effort. Slide a slider underneath each leg of the furniture, pre-spray in front of the furniture in the open area first. Then slide the couches etc. to the center and pre-spray behind. clean the areas where the furniture used to sit and move the pieces back in place . Lift them with the lift buddy and replace the slider with a styrofoam Block. The leg never touches the wet floor to possibly transfer furniture stain to the carpet. ( I inform the customer that we trim around any piece of furniture that has glassware in it such as curios or china hutches, Gun cabinets or entertainment centers. ) That eliminated the risky moves.
They work excellant. I can't remember where I bought mine I have purchased cheaper one at Menards , but I prefer to use the heavier duty ones from Jon Don Inc. approx. $ 30.00 U.S. per set of 4