I'm changing the floor tiles in the house. The 11 x 22 foot (250 sq ft) room of the house had fairly stubborn tile and thin tile. With this chisel and "TACKLIFE 1-1/4" SDS-Plus Rotary Hammer, 12.3 Amp 7 Joules, Variable Speed, 4350 BPM, 0-900 RPM, 4 Functions, Vibration Dampening Technology, Safety Clutch, ideal for concrete and Stones - TRH01A" took about 8 hours for 1.5 people (I had half a day to help). If I were to do it again or in a larger space I would buy a longer piece to save some back.