Tetris Insulated Conc Beam Flooring - Experiences ?

[Renovation]

I'm intending to use the Tetris system for my extension - I was going to use Cube6 but their lead time it too long.

Googling for reviews of Tetris doesn't find much - has anyone used it ?

http://www.tetrisfloors.co.uk/

Part of my reason for choosing it is that it looks to be the simplest and fastest system to lay (I'll be doing it)

[Renovation]

Apparently not.