I have a home gym with weights (including the 45lbs weights). I bought these mats because I didn't want these weights to accidentally cause damage to my tile floor and carpet. They have been doing their job nicely, though if weights sit on these mats long enough, they will leave marks/dents on the mats themselves--I think these marks/dents are permanent. But they are still doing their job, so I am giving them 4 stars.
This is a nice mat under our gym equipment but the ends don't line up so you have to use a box cutter to cut off extra mat to make the mat work. Kind of odd but not a big deal. Over all a nice mat.
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