The ILS ought to be viewed with a touch of jaundiced eye. There are a number of problems which can arise, especially with the ground equipment, which can suckerbait the pilot into an awkward situation.
It is not very long ago that a well regarded airline went close to putting a wide body twinjet into the water following an erroneous glideslope intercept.
Out of the quite detailed investigation into this near accident came the conclusion that one ought to position with reference to independent guidance onto the ILS to avoid most of the problems. That is to say, just selecting approach might not always be a good idea.