I used several different types. The ones with a smooth or ribbed surface are particularly slippery with saw dust. I've pretty much covered all the walking areas of my shop with the type in the picture. They have been great for my long days on concrete that didn't bother me when I was younger. Since my shop is at my home, I can spend 12 hrs. a day in there most days of the week. Different types of work shoes didn't help much. One nice advantage is that sawdust doesn't lay on top so I'm not tracking it outside of the shop or into the house. I can go weeks without vacuuming up the shop. The majority of my dust is collected but there is always some. They also capture small parts like a nut or washer so they don't roll off into oblivion. If I drop a tool, they seem to be safe, in the past, I have broken some by dropping on the concrete, a favorite Record 3 in 1 rabbet plane, for one.
If I need to move a machine, I can pull up one or more as needed. Every few months, I'll pull them all and do a complete clean up. They are 3'x3' and interlock. I started using them in the 90's that's at least 15 yrs. and they haven't broken down, worn or given me any problems. I haven't priced them in awhile but they were around $20 each. I'd buy a few now and then until the shop was covered. I also use them under my drum set and for the first time in over 50 years, my drums don't slide around, period. The negative is that they are murder when the ladies come in with high heels, and very uncomfortable in bare feet.