It’s quicker

There are much cheaper ones, but this one has always made me chuckle. Yes they work

https://gosun.co/products/camping-stove-solar-kitchen?variant=29218238759006&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&srsltid=AfmBOop1jRISP8NOQUs66QMtD6C_O7_yI5c-tsH1rcKUGBX4yaVHJRcDYcA&com_cvv=8fb3d522dc163aeadb66e08cd7450cbbdddc64c6cf2e8891f6d48747c6d56d2c

https://gosun.co/products/solar-oven-kit?variant=39942550061150&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&srsltid=AfmBOooyopyAQCR0MhLBUfN_nZId6XzRGEBgRtLbaaPbJL0goIXDa_0IjY0&com_cvv=8fb3d522dc163aeadb66e08cd7450cbbdddc64c6cf2e8891f6d48747c6d56d2c

That one is just the oven part of the kitchen