what's this about chronic feet and leg probelms with slab heating?
the pipes in the wall option does offer better comfort although the
entire wall surface generally has to be used, otherwise ineffective.
here in the netherlands, wall-heating is viewed as more 'comfortable'
as the radiant heat is spread over the height of the room thereby
creating even les air-temp differences. I would not use the word
'chronic' in relation to the slight (negligible in comparison with
radiators/convectors) discomfort posed by slab-heating....