This is a great shoe. If you had the Sayonara 2, then you will find that this new version is slightly different but still great. The Sayonara is a lightweight training shoe or could be used as a marathon racing shoe. It feels a little bouncier and more responsive than the Sayonara 2 and also a little lower/racier in the forefoot. Some people have said that the new shoe is stiffer but with softer cushioning. The softer midsole cushioning could explain the feeling in the forefoot and the stiffness may give the Sayonara 3 the more responsive feel. The best upgrade over the Sayonara 2 is the upper, which was prone to rubbing in the previous shoe and would often end up with holes over the big toe nail. The new upper is very flexible and breathable, and is closest to the upper of the Mizuno Wave Musha, which is a discontinued racing flat. The toe box of the Sayonara 2 was very roomy and possibly a little large and 'sloppy'. The Sayonara 3 is a little smaller but still a good size, and with the improved upper it feels like there is plenty of room for the toes to move about. Mizuno running shoes are good value for money in general, in my opinion, and I got a very good price on these. The only quality issue with the Sayonara 2 was the upper, but that shouldn't be a problem with this version. Overall this is a very comfortable shoe and fast as well, partly due to being so lightweight. The heel to toe drop is apparently about 10mm, but as with the previous version it doesn't feel quite as big as that. Some people have measured the drop to be smaller, so there may some discrepancy there. It's far from zero drop though, so avoid it if that's what you're after. Another benefit of Mizuno shoes is the design work and this version is quite retro looking and very nice to look at. I got just over 1000km out of my Sayonara 2 shoes and I expect at least the same from these.