If you are doing a large area in them picture yourself setting a solid 12x12 tile level in a bed of peanut butter, fairly easy, press on the entire thing down then put a little more pressure on the high corner or side to set it down. With a sheet of penny tile it is not quite that simple and you have to take more care to get them level. Not at all impossible, just harder.

Not sure if they have the slip resistance to make them suitable for floors so check with the seller or check the spec sheet from the manufacturer.

Grout space is the biggest issue most people will have with penny tile. There tends to be a bit more grout area. People tend to like to minimize grout because it can mold and attract dirt so keep that in mind for the location of your penny tile.

I did use this tile in the kids bathroom floor and a little in the bath niche. I was charged an upcharge to install this tile and it took them quite a while to do it! They did an ok job but I still feel like the floor is not level. Once they clear all the mess and floor coverings this week I will take a pic.