Yes. Used mine at Mountain Mayhem on the Dyna Tech. Still a great set of pedals nearly two decades since their release.
I've only one pair of PD-M737's at the moment, along with some PD-M525's PD-M535's and then a few pairs of modern ones too.
I've also had PD-M747s and PD-M323's over the years, and I can honestly say that in terms of the clip in performance, the original PD-M737 SPD's are hard to beat assuming you discount their relatively weighty nature.