A lot better than I was expecting - I can't stand the band usually, but that was enjoyable. Nice falsetto work too.
Up until 2004 or so, I loved Frusciante's voice overall, while still finding his falsetto to be occasionally grating (but occasionally really damn good, too). It sounds like he took lessons or something, as there's a drastic change starting with first of many solo albums he put out in 2004. Don't know, just not a fan of whatever happened, and his already iffy falsetto took a huge hit as well (as heard here).