opinions on electrical smart boxes

These things are really tough, with a lot of interior room. The only drawback is that the box is physically very large, so if you cut a hole that's even slightly larger than the box, a standard wall plate won't cover it. I wouldn't waste my time with the single gang variety, but if you want a large, really strong and durable multi-gang box, they're great.

Hi, What is fire rating on this stuffs? I am stil old fashioned, sticking with metal boxes.

I've never seen them before. I like them!

I like the idea they are screwed in. You could easily readjust one or perhaps remove it later, make the opening larger, and install another.

(So it looks.)

Also sometimes the boxes are not installed just right to line up with the drywall, so looks like you could fix that with these boxes...

I generally like to use steel boxes, but these are probably two or three times as thick as a standard plastic box, making them very rigid. I don't know their fire rating but I would believe they'd be equal to steel. I especially like using them in three and four gang. Steel boxes screwed together to make multiple gangs, need support or they can break apart. Standard multi gang plastic boxes are so flimsy, they tend to twist making them hard to position flush with the drywall. These things are rigid like steel, and have the interior space of plastic

Where do you buy them?

never seen them but they look like a good product.

I get them from my local electrical supply, in Mt. Kisco, NY