Ive come to the taper section of my trainng for a 45 miler along the Southwest Coast path, Ive done most of my long runs in an old pair of Inov8 terroc 330 (good grip, not much cushioning) , which has gone ok but my feet can be pretty tender at the end of a 5-6 hour run.
Ive panic bought a pair of Salomon XR Crossmax (Neural) shoes which offer grip and cushioning but I havent tried and tested them on long runs.
It feels like a bit of a gamble which pair i should use, the non-cushioned Inov8's might be awful on the hard 10 road miles that comes around the 25 mile mark. But the untested Salomons might let me down earlier than that. (Ive had Tendonitus problems with the Guidance version of the Crossmax's but Ive now got the neutral type which i hope will be ok)