Mens Nike Air Zoom Elite+ 4

I've had several pairs of the Elite 1 and 2 but skipped the 3. Got the 4 a week ago and am generally impressed. Don't seem quite as fast as the earlier Elites but reckon I can easily do all my steady road runs in these and some longer tempos. So feel more of a lighter than average trainer than a racer/trainer as such. Feels like quite a fat sponge under my feet and certainly would not want to race in them. Initially got a blister on my heel but not entirely sure that was due to these. Seems better now. Fit true to size unlike many of Nike's spikes & flats which seem to be getting smaller by the year.