My old Mira shower and especially the diverter was nearing the end of its life. So I took a chance on a second hand Mira Mode. I was fortunate, the seller was totally genuine and had indeed swapped the unit for a high pressure version, as I required the low pressure version being sold. The unit was exactly described and worked perfectly. No more mechanical controls in the shower and rapid temperature adjustment plus good shower pressure, all in one near unit! Yes they are expensive new nearly £700.00 but worth it as installation is all in one area, no long pipe runs! Probably won't bother with the app, but for a large family perhaps a good idea! JM