Is this the best and cheapest proofing solution?

https://preview.redd.it/9wccokf400le1.png?width=1253&format=png&auto=webp&s=f6098eadfb2cc0ef8301db4aab4a5e8e85d48a55

was looking at foldable proofing containers, and the Brod and Taylor folding box comes up, and then there are glorified grocery bags with heating pads and then I came across this... a seedling mat with adjustable temperature. There's even a temperature probe to stick into whatever I'm monitoring.

I checked and it looks like someone else had this idea 6 years ago and he said it worked well for him. There's an even cheaper $11 version that simply maxes out at 86*F which is perfectly safe for proofing. I have some insulated grocery bags too so I could just toss it in one of those if I'm proofing bread.

I know... turn the oven light on and toss the bowl in there. It doesn't work that great for me and this thing only hits 20 watts.