By my computer our swivel managers chair had worn away (about 1/8" rut) and we couldn't afford new flooring for the 3 rooms. So I filled cracks (and even replaced some wood strips sanded stained and then varished the imperfections to make it level again. Then we bought this floor saver....just the right amount (a corner computer table) for our swivel 5 legged chair. Plenty of room to roll around. and nice to put my feet on the ground without worrying about splinters. I've heard the ones for carpet (abet thicker with stakes so they don't slide) also are very good.
Second one of these (the last one lasted over six years of every single day use with a roller chair!). Great product and fantastic price. Nice going STAPLES!