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I tested the iTRUSOU food warming mat with refrigerated leftover pizza, cups of water, a plate, and a thick Pyrex casserole dish. It warmed each item, the controls were easy to understand, and the surface had room for several dishes. The main concern is the heat underneath, especially when using it on a heat-sensitive surface.
The controls are straightforward. One control turns the mat on and off, while a separate button cycles through low, medium, and high. I used medium for a while, then switched to high for the thermal-camera demonstration. I prefer appliances with fewer buttons, so this layout worked well for me.
I placed refrigerated leftover pizza on the mat and kept a cold slice nearby for comparison. The warmed pizza had a crispy bottom. The thermal display showed 85 for the warmed pizza and 74 for the cold slice. Water in a glass cup showed 89.
The other dishes showed higher readings. A plate displayed 133 and appeared to still be getting warmer, while the thick Pyrex casserole dish displayed 120. These were readings from this demonstration, not controlled performance measurements, but they showed how heat transferred through several types of dishes.
The thermal view showed a fairly even-looking heating pattern across the working area, although the back of one pan felt a little hotter. The internal area also appeared to be warming, possibly because of residual heat from the heating element. That is worth considering when deciding where to use the mat.
I measured the mat at about 18 inches long by 12 to 13 inches wide. A 13-by-9-inch casserole dish fit, but another pan I brought out did not. I estimated that the surface could hold two large plates or keep the bases of roughly four smaller plates warm. The tall feet raise the heated section above the table, but I would not rely on them alone to protect a heat-sensitive surface.
The seller listing describes the mat as flexible and rollable. It lists three temperature settings of 140°F, 176°F, and 212°F, along with an automatic shutdown after three hours of inactivity. That shutdown is different from a user-set timer. I would still prefer an adjustable timer because I do not like leaving hot appliances on.
The listing also warns against prolonged use on surfaces that are not heat resistant. It says quartz, marble, and granite may discolor or crack after prolonged exposure to high heat, and it recommends placing a heat-insulating pad beneath the warmer.
Overall, I like the iTRUSOU warming mat for its simple controls and useful surface area. In my demonstration, it warmed pizza, water, a plate, and a thick glass casserole dish. My main reservations are the lack of a user-adjustable timer and the need to manage the heat beneath the mat carefully.