i've been told i have flat feet and overpronate so have always been sold a built up supportive shoe like the asics gel 3000 series. i got some asics ds trainers, which are a slightly lighter shoe with some control, for racing and found i felt better in those. so i wondered what would happen if i went even lighter and bought the inov f lite 220 and found they felt even better. after a month of getting used to them i ran a road marathon in them a fortnight ago and broke 3:30. someone with apparently bad biomechanics running in a shoe with very little cushioning or support and getting on fine.

in conclusion, ignore everything you're told (including this message), follow your instincts and wear what you want. the crucial thing is to convince yourself that the shoes you have are the right shoes, because you don't want any doubt to creep in during the marathon.

good luck for brighton