We currently supply about 500 slimline thermostats a year and overall we have no issues with them. But one grumble we always get from our customers is they would like to centerally control them. Now i know on the network system and now neo system you can do this but these are too expensive.
my suggestion is a digital thermostat to look the same as the multimode stat. But that can accept a switch signal from a timer to enable setback. (much like the DS-SB).
With this stat in our range this would bring in another 200 thermostats which