They are nice.
The flock is pretty dense and stuck on well.
The newer space saving tiles which are thinner are good.
I only use them, even when totally altering the surface and I could use wood, I use their tiles as they are light and robust all things considered.
If you Google some wargame show reports, there are usually a proportion of tiled tables, though typically shows are becoming more heavily geared towards 28mm games. Don’t forget good old carpet tiles as an option, get the right colour (they will take scrubbed into them) and the right pile and a decent quality and the joins between the tiles just disappear.
there should be some pictures on my blog, Im at work right now so cant check and see, but I have been using TSS tiles for around 10years and not had any issues with them, I have the 2ftx2ft and 1ftx1ft tiles along with a few 2ftx1ft tiles, despite rough handling they are all still fine, they have had one or two dings which can easily be repaired with a bit of paint/flock