Yes, PSPI works, but very sparingly, and certainly not worth all the effort that went into getting it to work.
Only half the free filters work in 64 bit, if that. And only two of my "paid for" plug-ins work, which somewhat tipped the balance to being more favorable.
However, the fact that ANY filters/plug-ins work is a plus, not a minus.
For the most part, you can still use most of the factory filters outside of using PSPI, which sort of makes up for the lack of PSPI working. Honestly, though, how many of us actually USE all those filters?
Then there is WINE. Which I also use for 3 Windows standalone plug-ins. One of which is the rain and snow being offered under the "Cool New Program" thread here at GimpChat.
You cannot do a kindness too soon because you never know how soon it will be too late.
~Ralph Waldo Emerson