Very easy to use. I was expecting something that adhered tiles to the floor. But that was my fault for not doing proper research. Instead the lay sticky up and lock the tiles together. Seeing as I was only doing one room, and I had 500 tabs, instead of putting them in just the corners I also put them on all straight sides between tiles. The hold very well, but are easy to adjust if mistakes are made. I was a little Leary about moving things across the carpet tiles, thinking it would roll up or lift. But, immediately after install in put in a sectional couch and slid it all the way across the room as a test. The tabs held secure and the carpet tiles did not budge one bit.