OP: I presume you mean St Mochta's Estate rather than St Mochta's School.
Estate is probably a mix of good, bad and indifferent . . . .
some parts are very nice, quiet and settled, others look very grubby and uncared for. It seems to depend on the street. There was a thread on here about a year ago which is probably still reasonably accurate if you do a search for it.
As regards location it's great. Close to schools, shops, train station, etc.
Hope that helps.