all in one steam shower cabinets

Fitting a all in one shower unit soon,
just wondering a couple of things
do you tile behind these and fit them as the last item? or fit them then tile up to it?
also would they just have a hot and cold feed to them or would i need to pipe up all the jets shower valve etc seperatly

Many thanks

This is the unit Quadrant Steam Shower Cabins

Tiling would depend on if you wanted to waste tiles or not, tile upto it I guess. It may even have a cold only supply as im guessing it must have some sort of built in heater for the steam

Looking at a different brand they normaly take a normal 13a fused and rcd supply and hot and cold feeds that are balanced and you don't have to tile behind unless you want too