I went through about 4 pairs of the Foundation 8s and loved them.  I didn't like the 9s as much, so I was really looking forward to the Foundation 10.

Turns out they are a completely different shoe, way overcushioned and feel sloppy.  More like the Brooks Beast, which I did not care for at all.

The 8 was great, the 9 barely OK, and the 10 sucks.  I think Asics went in the wrong direction with this model - they should take a page from NB's book with the classic 992 and just keep making the Foundation 8.

I returned them and found a pair of Foundation 8s on the interweb.  Will buy all I can get my hands on, then probably switch to a different brand, maybe back to NB.