In reply to humptydumpty:
Only true approach shoes I have used are Ganda Guides. I chose them for comfort, good grip on the foot helped by a highish ankle, abilty to stand on smallish holds ie stiffish, (don't like shoes manufactured with a curved up toe for climbing) and adjusted them for terrain as necessary with different sock combinations, cheap insoles from Boots, and altering lacing. They don't have waterproof lining which is fine for me (lighter, cooler, dry quicker though I take poly bags to put inside just in case). They were brilliant along the Cuillin ridge in the recent dry spell.