Generally at first many Bigades were nervous about these and put many conditions on their use, such as smoke detectors within 2m either side, not to be fitted in staircases in care homes, must be closed at night, etc etc.
But they are now much more widely accepted in most buildings, even on staircases as brigades have recognised that the alternative may well be a wedge except in the best managed and disciplined buildings.
The HTM hospital guides still have some limitations on their use and obviously there have to be some limitations- for example between purpose groups, where pressurisation has been used, in some locations where the staircase interconnects upper floors with basements but I dont think you will find objection in most locations as per the Aproved document B if the device is necessary for the safe and effective approved use of the building.
I have even reluctantly recommended their use in a couple of instances on kitchens where only heat detectors are fitted, if I have found wedges in use. That should cause some comment no doubt!
One ket point though is to specify the magnet to be fitted at the same point as the self closer to avoid opposing forces twisting the door. And if possible go for swing free closers rather than magnets.