This is a complete kit for the square footage needed. Everything is included except for an electrical box and separate conduits for the floor sensor and floor heat leed wires. The step by step directions were easy to follow and clear. Note: there is an extra floor sensor included in the thermostat box that is for future use if needed. I will use this product again.

The Ditra system is really pricey (although the price on Amazon was excellent, Home Depot wants almost 50 % more money for exactly the same set), but Schluter, called Schlüter in Germany, where they have had a stellar reputation for years, is the perfect example of a German quality product: sturdy material, brilliant engineering, precise execution and sophisticated function (not to mention slightly over-abundant product information"¦). The price as a set, by the way, is still much cheaper than buying the components individually. The thermostat alone in the programmable touchscreen version is over $200! My contractor was very favorably impressed by the system, which he did not know, and said there is no comparison with some flimsy alternatives available on the market,

Be aware, though, that the system will not cover the whole surface of a very large bathroom. Mine is just a bit over 90 sqft, and after deducting the footprint of the tub, shower, toilet bowl and vanity + a stripe roughly 8" wide along the walls, it covered what was left almost exactly. Please take into account, by the way, that if you lay tiles over the whole surface, as one usually does, you will need additional mats without wiring to achieve a consistent height. So you will have to buy some extra mat material (which is not cheap for what it is) on Amazon, eBay, or at a DIY store that carries the product (be aware that it must be Ditra Heat; the normal Ditra decoupling membrane is cheaper, but thinner).

Easy to install. Works as described. What all building products should be.